Quick answers
- Is CVE-2026-43934 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-43934 being exploited in the wild.
- How severe is CVE-2026-43934?
- Medium severity, with a CVSS score of 6.5, published 26 May 2026.
- Which products and versions are affected?
- E107inc E107 < 2.3.4.
- Is there a fix for CVE-2026-43934?
- A patch was published on 2026-05-26: Fix released in version 2.3.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-43934 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-43934?
- Check whether you run E107inc E107 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A broken access control vulnerability (Insecure Direct Object Reference) exists in e107 CMS prior to version 2.3.4. The application's comment editing logic in `comment.php` and the `updateComment` function in `comment_class.php` failed to verify if the requesting user was the original author of the comment. An attacker with a low-privileged account can exploit this by sending a POST request to `comment.php?mode=edit` with a manipulated `itemid` parameter. Because the server-side SQL query originally only filtered by `comment_id` without checking `comment_author_id`, the attacker can successfully overwrite any comment in the database. This issue is resolved in version 2.3.4 by adding an ownership check to the database update query.
Affected products
- e107inc e107 < 2.3.4
Timeline
- 2026-05-05: advisory: GitHub Security Advisory published by the vendor
- 2026-05-26: disclosed: CVE published to the NVD
- 2026-05-26: patched: Fix released in version 2.3.4