CVE-2026-43934 e107: Broken Access Control in e107 comment edit allows cross-user comment modification
An authenticated user can modify comments belonging to other users due to missing ownership validation in the e107 CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-43934?
CVE-2026-43934 is a medium-severity missing authorization vulnerability in e107inc e107, published on 26 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
e107 is a content management system (CMS). Prior to 2.3.4, a Broken Access Control vulnerability exists in the application, allowing an unauthorized authenticated user to edit comments posted by others. This stems from inadequate server-side access control validation, where the application depends only on a predictable identifier in the request to determine which comment to edit, without confirming the requesting user’s ownership of the comment. This vulnerability is fixed in 2.3.4.
Which versions are affected by CVE-2026-43934?
How do I fix CVE-2026-43934?
No fix has been published for CVE-2026-43934 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-43934 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43934 exists.
Sources
Also known as GHSA-5w63-63rh-99q6.