Change Details

Create an item with description <img src=x onerror=alert()> or change an existing an item and add this description. Add a wiki sitelink or go to an existing wiki sitelink of that item. Click on the "page information" sidebar link, e.g. so you arrive at a page like https://en.wikipedia.org/w/index.php?title=Earth&action=info. View an alert box originating from the "Central description" row.

Create an item with description <img src=x onerror=alert()> or change an existing item and add this description. Add a wiki sitelink or go to an existing wiki sitelink of that item. Click on the "page information" sidebar link, e.g. so you arrive at a page like https://en.wikipedia.org/w/index.php?title=Earth&action=info. View an alert box originating from the "Central description" row.

Create an item with description <img src=x onerror=alert()> or change an existing an item and add this description. Add a wiki sitelink or go to an existing wiki sitelink of that item. Click on the "page information" sidebar link, e.g. so you arrive at a page like https://en.wikipedia.org/w/index.php?title=Earth&action=info. View an alert box originating from the "Central description" row.