mediawiki/RELEASE-NOTES-1.28
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RELEASE-NOTES-1.28
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			== MediaWiki 1.28.3 ==

			This is a security and maintenance release of the MediaWiki 1.28 branch.

			=== Changes since 1.28.2 ==
			* (T168856) Allow SVGs created by Dia to be uploaded.
			* (T157545) Add missing doUpdates() call to refreshLinks.php.
			* (T165714) (T100085) Better handling of jobs execution in post-connection shutdown.
			* (T154425) (T154438) (T157679) Use AutoCommitUpdate instead of Database->onTransactionIdle.
			* (T154425) Make DeferredUpdates detect LBFactory transaction rounds.
			* (T149454) Restore erroneously removed realTableName call from DatabasePostgres.
			* (T167798) Fix phrase search and highlighting for phrase queries.
			* (T151136) Provide credits information to callbacks in extension registration.
			* (T160462) Allow namespaces defined in extension.json to be overwritten locally.
			* (T168337) Fix ErrorPageError to work from non-UI contexts.
			* (T143788) Backports for PHP 7.0 and 7.1 support.
			* (T175439) Unbreak Postgres Updater when setting defaults for a column.
			* (T160298) Remove use of implicitGroupBy() in ActiveUsersPager.
			* (T174255) Declare uploadCount property in importDump.php.
			* (T180231) SECURITY: Updated dev dependancy phpunit/phpunit from v4.8.24 to v4.8.36.
			* (T178451) SECURITY: Potential XSS when $wgShowExceptionDetails = false and browser
			sends non-standard url escaping.
			* (T165846) SECURITY: BotPassword login attempts weren't throttled.
			* (T128209) SECURITY: Reflected File Download from api.php.
			* (T134100) SECURITY: Do not reveal if user exists during login failure.
			* (T176247) SECURITY: Ensure Message::rawParams can't lead to XSS.
			* (T125163) SECURITY: Make anchor for headlines escape > and <.
			* (T180237) SECURITY: Protect vendor folder with .htaccess.
			* (T180231) SECURITY: Remove PHPUnit file with known RCE if exists in update.php.
			* (T124404) SECURITY: XSS in langconverter when regex hits pcre.backtrack_limit.
			* (T119158) SECURITY: Handle -{}- syntax in attributes safely.

			== MediaWiki 1.28.2 ==

			Due to a packaging error, the wrong version of the SyntaxHighlight extension was
			included in the tarball version of MediaWiki 1.28.1. The version included had a
			serious security issue in it (T158689). There was also some minor code fixes in
			MediaWiki itself since 1.28.1, but none of them were security relevant.

			== MediaWiki 1.28.1 ==

			This is a security and maintenance release of the MediaWiki 1.28 branch.

			=== Changes since 1.28.0 ===

			* $wgRunJobsAsync is now false by default (T142751). This change only affects
			wikis with $wgJobRunRate > 0.
			* Fix fatal from "WaitConditionLoop" not being found, experienced when a wiki has
			more than one database server setup.
			* (T152717) Better escaping for PHP mail() command,
			* (T154670) A missing method causing the MySQL installer to fatal in rare
			circumstances was restored.
			* (T154672) Un-deprecate ArticleAfterFetchContentObject hook.
			* (T158766) Avoid SQL error on MSSQL when using selectRowCount().
			* (T145635) Fix too long index error when installing with MSSQL.
			* (T156184) $wgRawHtml will no longer apply to internationalization messages.
			* (T160519) CACHE_ANYTHING will not be CACHE_ACCEL if no accelerator is installed.
			* (T154872) Fix incorrect ar_usertext_timestamp index names in new 1.28 installs.
			* (T109140) (T122209) SECURITY: Special:UserLogin and Special:Search allow redirect
			to interwiki links.
			* (T144845) SECURITY: XSS in SearchHighlighter::highlightText() when
			$wgAdvancedSearchHighlighting is true.
			* (T125177) SECURITY: API parameters may now be marked as "sensitive" to keep
			their values out of the logs.
			* (T150044) SECURITY: "Mark all pages visited" on the watchlist now requires a CSRF
			token.
			* (T156184) SECURITY: Escape content model/format url parameter in message.
			* (T151735) SECURITY: SVG filter evasion using default attribute values in DTD
			declaration.
			* (T161453) SECURITY: LocalisationCache will no longer use the temporary directory
			in it's fallback chain when trying to work out where to write the cache.
			* (T48143) SECURITY: Spam blacklist ineffective on encoded URLs inside file inclusion
			syntax's link parameter.
			* (T108138) SECURITY: Sysops can undelete pages, although the page is protected against
			it.

			== MediaWiki 1.28 ==

			=== Changes since 1.28.0-rc1 ===
			* (T148957) Replace wgShowExceptionDetails with wgShowDBErrorBacktrace on db
			errors.
			* (T148956) Only apply wgDBschema to postgres/mssql.
			* (T145991) Introduce separate log action for deleting pages on move.
			* (T141474) (T110464) Bypass login page if no user input is required.

			=== Changes since 1.28.0-rc0 ===
			* (T142210) The changes to move the parser "NewPP limit report" from a HTML
			comment to a machine-readable JavaScript config option 'wgPageParseReport'
			have been undone. They caused the human-readable limit report to be shown
			incompletely or not at all. ParserOutput::setLimitReportData() and
			getLimitReportData() behave as they did in MediaWiki 1.27 again.
			* (T149510) Value of {{DISPLAYTITLE:}} parser function will not be used for
			the text of subheadings on a category page when creating it. This wasn't
			working correctly.
			* (T106793) MediaWiki will no longer try to perform a HTTP redirect to the
			canonical pretty URL when a non-pretty URL is used. It resulted in redirect
			loops in some clients and in some server configurations. This undoes a change
			made in MediaWiki 1.26.
			* (T149759) manifest_version: 2 was removed.

			=== Configuration changes in 1.28 ===
			* $wgSend404Code now affects status code of action=history if the page is not there.
			* BREAKING CHANGE: $wgHTTPProxy is now required for all external requests
			made by MediaWiki via a proxy. Relying on the http_proxy environment
			variable is no longer supported.
			* The load.php entry point now enforces the existing policy of not allowing
			access to session data, which includes the session user and the session
			user's language. If such access is attempted, an exception will be thrown.
			* The number of internal PBKDF2 iterations used to derive the session secret
			is configurable via $wgSessionPbkdf2Iterations.
			* Upload dialog's file upload log comment can now be configured separately for
			local and foreign uploads.
			* $wgForeignUploadTargets now defaults to `[ 'local' ]`, where `'local'`
			signifies local uploads. A value of `[]` (empty array) now means that
			no upload targets are allowed, effectively disabling the upload dialog.
			* The deprecated $wgEditEncoding variable has been removed; it was only used
			for Esperanto language character conversion. You are now recommended to use
			input methods provided by the UniversalLanguageSelector extension.
			* When $wgPingback is true, MediaWiki will periodically ping
			https://www.mediawiki.org/beacon with basic information about the local
			MediaWiki installation. This data includes, for example, the type of system,
			PHP version, and chosen database backend. This behavior is off by default.
			* When $wgEditSubmitButtonLabelPublish is true, MediaWiki will label the button
			to store-to-database-and-show-to-others as "Publish page"/"Publish changes";
			if false, the default, they will be "Save page"/"Save changes".
			* The 'editcontentmodel' permission is now granted to all logged-in users ('user').
			instead of just administrators ('sysop'). Documentation for this feature is
			available at <https://www.mediawiki.org/wiki/Help:ChangeContentModel>.
			* $wgRevisionCacheExpiry is now set to one week by default instead of being disabled.
			* Magic links are now disabled by default, and can be re-enabled by modifying the value
			of $wgEnableMagicLinks. Their usage is discouraged, but if they are manually enabled,
			a tracking category will be added to help identify usage and make it easier to migrate
			away from. If you depend upon magic link functionality, it is requested that you comment
			on <https://www.mediawiki.org/wiki/Requests_for_comment/Future_of_magic_links> and
			explain your use case(s).
			* New config variable $wgCSPFalsePositiveUrls to control what URLs to ignore
			in upcoming Content-Security-Policy feature's reporting.

			=== New features in 1.28 ===
			* User::isBot() method for checking if an account is a bot role account.
			* Added a new 'slideshow' mode for galleries.
			* Added a new hook, 'UserIsBot', to aid in determining if a user is a bot.
			* Added a new hook, 'ApiMakeParserOptions', to allow extensions to better
			interact with API parsing.
			* Added a new hook, 'UploadVerifyUpload', which can be used to reject a file
			upload. Unlike 'UploadVerifyFile' it provides information about upload comment
			and the file description page, but does not run for uploads to stash.
			* (T141604) Extensions can now provide a better error message when their
			maintenance scripts are run without the extension being installed.
			* (T8948) Numeric sorting in categories is now supported by setting $wgCategoryCollation
			to 'uca-default-u-kn' or 'uca-<langcode>-u-kn'. If you can't use UCA collations,
			a 'numeric' collation is also available. If migrating from another
			collation, you will need to run the updateCollation.php maintenance script.
			* Two new codes have been added to #time parser function: "xit" for days in current
			month, and "xiz" for days passed in the year, both in Iranian calendar.
			* mw.Api has a new option, useUS, to use U+001F (Unit Separator) when
			appropriate for sending multi-valued parameters. This defaults to true when
			the mw.Api instance seems to be for the local wiki.
			* After a client performs an action which alters a database that has replica databases,
			MediaWiki will wait for the replica databases to synchronize with the master database
			while it renders the HTML output. However, if the output is a redirect to another wiki
			on the wiki farm with a different domain, MediaWiki will instead alter the redirect
			URL to include a ?cpPosTime parameter that triggers the database synchronization when
			the URL is followed by the client. The same-domain case uses a new cpPosTime cookie.
			* Added new hooks, 'ApiQueryBaseBeforeQuery', 'ApiQueryBaseAfterQuery', and
			'ApiQueryBaseProcessRow', to make it easier for extensions to add 'prop' and
			'show' parameters to existing API query modules.

			=== External library changes in 1.28 ===

			==== Upgraded external libraries ====
			* Updated es5-shim from v4.1.5 to v4.5.8
			* Updated composer/semver from v1.4.1 to v1.4.2
			* Updated wikimedia/php-session-serializer from v1.0.3 to v1.0.4

			==== New external libraries ====
			* Added wikimedia/scoped-callback v1.0.0
			* Added wikimedia/wait-condition-loop v1.0.1

			=== Bug fixes in 1.28 ===
			* (T146496) action=history pages should return 404 HTTP error code if the page does not exist
			* (T137264) SECURITY: XSS in unclosed internal links
			* (T133147) SECURITY: Escape '<' and ']]>' in inline <style> blocks
			* (T133147) SECURITY: Require login to preview user CSS pages
			* (T132926) SECURITY: Do not allow undeleting a revision deleted file if it is
			the top file
			* (T129738) SECURITY: Make $wgBlockDisablesLogin also restrict logged in
			permissions
			* (T129738) SECURITY: Make blocks log users out if $wgBlockDisablesLogin is true
			* (T139670) Move 'UserGetRights' call before application of
			Session::getAllowedUserRights()

			=== Action API changes in 1.28 ===
			* Added 'maxarticlesize' property to action=query&meta=siteinfo which contains
			the value of $wgMaxArticleSize.
			* Property 'modulemessages' from action=parse&prop=modules was removed
			(deprecated since 1.26).
			* The following response properties from action=login, deprecated in 1.27, are
			now removed: lgtoken, cookieprefix, sessionid. Clients should handle cookies
			to properly manage session state.
			* Submitting the lgtoken and lgpassword parameters in the query string to
			action=login is now deprecated and outputs a warning. They should be submitted
			in the POST body instead.
			* Submitting sensitive authentication request parameters to action=clientlogin,
			action=createaccount, action=linkaccount, and action=changeauthenticationdata
			in the query string is now deprecated and outputs a warning. They should be
			submitted in the POST body instead.
			* (T141960) Multi-valued parameters may now be separated using U+001F (Unit Separator)
			instead of the pipe character. This will be useful if some of the multiple
			values need to contain pipes, e.g. for action=options.
			* The API will now warn if input is not NFC-normalized Unicode or if it
			contains invalid characters.
			* The 'normalized' list output by action=query and other modules that use
			ApiPageSet may contain entries where the 'from' value is percent-encoded as
			the raw value cannot be represented in a valid API response. These are
			indicated by a 'fromencoded' boolean alongside the existing 'from' parameter.
			* (T28680) action=paraminfo can now return info about all submodules of a
			module without listing them all explicitly.
			* (T146770) It is now possible to assert that the current user is a specific
			named user, using the 'assertuser' parameter.
			* (T141963) Added a 'known' property when missing-but-known titles (e.g. from
			the 'TitleIsAlwaysKnown' hook) are output in various modules.

			=== Action API internal changes in 1.28 ===
			* Added a new hook, 'ApiMakeParserOptions', to allow extensions to better
			interact with ApiParse and ApiExpandTemplates.
			* (T139565) SECURITY: API: Generate head items in the context of the given title
			* (T115333) SECURITY: Check read permission when loading page content in ApiParse
			* ApiBase::getResultData() was removed (deprecated since 1.25)
			* ApiBase::makeHelpArrayToString() was removed (deprecated since 1.25)
			* ApiBase::makeHelpMsgParameters() was removed (deprecated since 1.25)
			* ApiBase::makeHelpMsg() was removed (deprecated since 1.25)
			* ApiFormatBase::formatHTML() was removed (deprecated since 1.25)
			* ApiFormatBase::getNeedsRawData() was removed (deprecated since 1.25)
			* ApiFormatBase::getWantsHelp() was removed (deprecated since 1.25)
			* ApiFormatBase::setBufferResult() was removed (deprecated since 1.25)
			* ApiFormatBase::setHelp() was removed (deprecated since 1.25)
			* ApiFormatBase::setUnescapeAmps() was removed (deprecated since 1.25)
			* ApiMain::makeHelpMsgHeader() was removed (deprecated since 1.25)
			* ApiMain::reallyMakeHelpMsg() was removed (deprecated since 1.25)
			* ApiMain::setHelp() was removed (deprecated since 1.25)
			* ApiResult::beginContinuation() was removed (deprecated since 1.25)
			* ApiResult::cleanUpUTF8() was removed (deprecated since 1.25)
			* ApiResult::convertStatusToArray() was removed (deprecated since 1.25)
			* ApiResult::disableSizeCheck() was removed (deprecated since 1.24)
			* ApiResult::enableSizeCheck() was removed (deprecated since 1.24)
			* ApiResult::endContinuation() was removed (deprecated since 1.25)
			* ApiResult::getData() was removed (deprecated since 1.25)
			* ApiResult::getIsRawMode() was removed (deprecated since 1.25)
			* ApiResult::setContent() was removed (deprecated since 1.25)
			* ApiResult::setContinueParam() was removed (deprecated since 1.25)
			* ApiResult::setElement() was removed (deprecated since 1.25)
			* ApiResult::setGeneratorContinueParam() was removed (deprecated since 1.25)
			* ApiResult::setIndexedTagName_internal() was removed (deprecated since 1.25)
			* ApiResult::setIndexedTagName_recursive() was removed (deprecated since 1.25)
			* ApiResult::setMainForContinuation() was removed (deprecated since 1.25)
			* ApiResult::setParsedLimit() was removed (deprecated since 1.25)
			* ApiResult::setRawMode() was removed (deprecated since 1.25)
			* ApiResult::size() was removed (deprecated since 1.25)
			* Added new hooks, 'ApiQueryBaseBeforeQuery', 'ApiQueryBaseAfterQuery', and
			'ApiQueryBaseProcessRow', to make it easier for extensions to add 'prop' and
			'show' parameters to existing API query modules. A query module can enable
			these hooks by passing an array for $hookData to ApiQueryBase::select() and
			by calling ApiQueryBase->processRow() before adding a row's data to the
			result.
			* (T125177) SECURITY: API parameters may now be marked as "sensitive" to keep
			their values out of the logs.

			=== Languages updated in 1.28 ===

			MediaWiki supports over 375 languages. Many localisations are updated
			regularly. Below only new and removed languages are listed, as well as
			changes to languages because of Phabricator reports.

			* (T137411) ban (Balinese), thanks to translators Adi Mayndra, Andru,
			BASAbali, M. Adiputra, Naval Scene, Nemo bis, NoiX180, and 아라.
			* (T135867) shn (Shan), thanks to translators Khun Sar, Piangpha,
			Saiddzone Saimawnkham, Saosukham, and Sengwan.
			* Czech (cs) and Slovak (sk) set as reciprocal fallbacks.
			* (T146744) Livvi-Karelian (olo) namespace messages created thanks to translator Ilja.mos.

			=== Other changes in 1.28 ===
			* (T128697) Improved handling of large diffs.
			* [BREAKING CHANGE] $wgExtendedLoginCookies has been removed. You can
			use or update a custom session provider if needed.
			* Deprecated APIEditBeforeSave hook in favor of EditFilterMergedContent.
			* The 'UploadVerification' hook is deprecated. Use 'UploadVerifyFile' instead.
			* SiteConfiguration::isLocalVHost() was removed (deprecated since 1.25).
			* The 'UserLoginComplete' hook has a new parameter to differentiate between actual
			login and visiting the login page while already logged in.
			* ResourceLoader::makeLoaderURL() was removed (deprecated since 1.24).
			* $.fn.liveAndTestAtStart was removed (deprecated since 1.24).
			* mw.util.tooltipAccessKeyPrefix was removed (deprecated since 1.24).
			* mw.util.tooltipAccessKeyRegexp was removed (deprecated since 1.24).
			* Linker::link() and Linker::linkKnown() were deprecated; please instead use
			MediaWiki\Linker\LinkRenderer. In addition, the LinkBegin and LinkEnd hooks
			were replaced by HtmlPageLinkRendererBegin and HtmlPageLinkRendererEnd
			respectively. See docs/hooks.txt for the specific changes needed for those hooks.
			* Linker::formatSize() was deprecated. Use Language::formatSize() directly.
			* Aliases for Linker methods, deprecated since 1.21, were removed from Skin:
			* Skin::commentBlock() (use Linker::commentBlock() instead)
			* Skin::generateRollback() (use Linker::generateRollback() instead)
			* Skin::link() (use MediaWiki\Linker\LinkRenderer instead)
			* Skin::linkKnown() (use MediaWiki\Linker\LinkRenderer instead)
			* Skin::userLink() (use Linker::userLink() instead)
			* Skin::userToolLinks() (use Linker::userToolLinks() instead)
			* Disabled "bug 2702" HTML tidying of parsed UI messages on wikis where Tidy is
			disabled.
			* DifferenceEngine::generateDiffBody() was removed (deprecated since 1.21).
			* UploadBase::stashFileGetKey() and UploadBase::stashSession() were deprecated.
			Use ...->stashFile()->getFileKey() instead.
			* "Public domain" was removed as a wiki license option from the installer, in
			favour of CC-0.
			* AuthenticationRequest::$required is now changed from REQUIRED to PRIMARY_REQUIRED
			on requests needed by primary providers even if all primaries need them.
			Primary providers are discouraged from returning multiple REQUIRED requests.
			* OOjs UI PHP widgets constructed with the `'infusable' => true` config option
			will no longer be automatically infused. You should call `OO.ui.infuse()`
			on them yourself from your JavaScript code.
			* parserTests.php has moved to tests/parser/parserTests.php
			* The command line options specific to parser tests have been removed from
			phpunit.php: --regex and --keep-uploads. Instead of --regex, use --filter.
			Instead of --keep-uploads, use the same option to parserTests.php, but you
			must specify a directory with --upload-dir.
			* The 'jquery.arrowSteps' ResourceLoader module is now deprecated.
			* IP::isConfiguredProxy() and IP::isTrustedProxy() were removed. Callers should
			migrate to using the same functions on a ProxyLookup instance, obtainable from
			MediaWikiServices.
			* The ArticleAfterFetchContent, ArticleInsertComplete, ArticleSave, ArticleSaveComplete,
			ArticleViewCustom, EditFilterMerged, EditPageGetDiffText, EditPageGetPreviewText and
			ShowRawCssJs hooks will now emit deprecation warnings if used.
			* (T68404) CSS3 attr() function with url type is no longer allowed
			in inline styles.
			* Database::getSearchEngine() is deprecated, use SearchEngineFactory::getSearchEngineClass
			instead.

			== Compatibility ==

			MediaWiki 1.28 requires PHP 5.5.9 or later. There is experimental support for
			HHVM 3.6.5 or later.

			MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
			support for them is somewhat less mature. There is experimental support for
			Oracle and Microsoft SQL Server.

			The supported versions are:

			* MySQL 5.0.3 or later
			* PostgreSQL 8.3 or later
			* SQLite 3.3.7 or later
			* Oracle 9.0.1 or later
			* Microsoft SQL Server 2005 (9.00.1399)

			== Upgrading ==

			1.28 has several database changes since 1.27, and will not work without schema
			updates. Note that due to changes to some very large tables like the revision
			table, the schema update may take quite long (minutes on a medium sized site,
			many hours on a large site).

			If upgrading from before 1.11, and you are using a wiki as a commons
			repository, make sure that it is updated as well. Otherwise, errors may arise
			due to database schema changes.

			If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
			new database fields are filled with data.

			If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
			1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
			with MediaWiki 1.21.

			Don't forget to always back up your database before upgrading!

			See the file UPGRADE for more detailed upgrade instructions.

			For notes on 1.27.x and older releases, see HISTORY.

			== Online documentation ==

			Documentation for both end-users and site administrators is available on
			MediaWiki.org, and is covered under the GNU Free Documentation License (except
			for pages that explicitly state that their contents are in the public domain):

			https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation

			== Mailing list ==

			A mailing list is available for MediaWiki user support and discussion:

			https://lists.wikimedia.org/mailman/listinfo/mediawiki-l

			A low-traffic announcements-only list is also available:

			https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce

			It's highly recommended that you sign up for one of these lists if you're
			going to run a public MediaWiki, so you can be notified of security fixes.

			== IRC help ==

			There's usually someone online in #mediawiki on irc.freenode.net.

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