CVE-2026-81917 Concrete CMS below 9.5.3 is vulnerable to Stored XSS in the Document Library block file description and tags

Concrete CMS below 9.5.3 does not apply HTML output escaping to the file description and tags fields when rendering the Document Library block, so a user with permission to edit file properties could store a script payload that executed in the browser of any visitor to a page displaying the block...