Extensions should use the new default validation mechanism for JSON request bodies, instead of using JsonBodyValidator.
WMF Extensions to fix:
- ReadingLists
- CheckUser
- GrowthExperiments
- CampaignEvents - T365526
- WikimediaCampaignEvents - T365527
- SecurePoll
- FlaggedRevs
- IPInfo
- ReportIncident
- Wikibase (TypeValidatingJsonBodyValidator extends JsonBodyValidator) - Picked up by Wikibase team, see T363084
Affected 3rd party extensions:
Moved to T365757