CVE-2021-26039
An issue was discovered in Joomla! 3.0.0 through 3.9.27. Inadequate escaping in the imagelist view of com_media leads to a XSS vulnerability.
Date published : 2021-07-07
https://developer.joomla.org/security-centre/860-20210705-core-xss-in-com-media-imagelist.html