CVE-2025-12346 | MaxSite CMS up to 109 HTTP Header uploads-require-maxsite.php X-Requested-FileName/X-Requested-FileUpDir unrestricted upload

A vulnerability, which was classified as critical, has been found in MaxSite CMS up to 109. This vulnerability affects unknown code of the file application/maxsite/admin/plugins/auto_post/uploads-require-maxsite.php of the component HTTP Header Handler. Performing manipulation of the argument X-Requested-FileName/X-Requested-FileUpDir results in unrestricted upload.

This vulnerability is known as CVE-2025-12346. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

The vendor was contacted early about this disclosure but did not respond in any way.