CVE-2026-57827 Details.
RSFiles! for Joomla - Arbitrary File Upload
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-57827. What It Means.
RSFiles! (com_rsfiles) for Joomla < 1.17.12 allows unauthenticated arbitrary file upload via the rsfiles.upload task. The write method performs no authentication, CSRF token, or file extension checks, allowing upload of executable PHP files to the web-accessible downloads/ directory.
Affected Product. What Is Hit.
- Vendor
- rsjoomla
- Product
- Rsjoomla RSFiles
FAQ
Common Questions.
RSFiles! for Joomla - Arbitrary File Upload. RSFiles! (com_rsfiles) for Joomla < 1.17.12 allows unauthenticated arbitrary file upload via the rsfiles.upload task. The write method performs no authentication, CSRF token, or file extension checks, allowing upload of executable PHP files to the web-accessible downloads/ directory.
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-57827 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-57827 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update Rsjoomla RSFiles to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-57827. Atlas does not run a check for it, so nothing here says whether a particular site is affected.