CVE-2026-61511 Details.
vBulletin 6.x - Remote Code Execution
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-2026-61511. What It Means.
vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contain an eval injection vulnerability caused by insufficiently restrictive regex filtering in vB5_Template_Runtime::runMaths(), letting unauthenticated remote attackers execute arbitrary PHP code via the pagenav[pagenumber] parameter in ajax/render template route.
Affected Product. What Is Hit.
- Vendor
- vbulletin
- Product
- vBulletin
References. Where To Read More.
FAQ
Common Questions.
vBulletin 6.x - Remote Code Execution. vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contain an eval injection vulnerability caused by insufficiently restrictive regex filtering in vB5_Template_Runtime::runMaths(), letting unauthenticated remote attackers execute arbitrary PHP code via the pagenav[pagenumber] parameter in ajax/render template route.
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-2026-61511 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-61511 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update vBulletin 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-2026-61511. Atlas does not run a check for it, so nothing here says whether a particular site is affected.