Auth bypass in Tomdever Wpforo Forum
CVE-2026-91092
The wpForo Forum plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over another guest author's forum post and modify its title, body, author name, and stored owner email address. This requires that guest posting and editing are enabled on the forum, and that the attacker knows the target guest author's email address.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/97084759-a8fb-4b26-a6fa-93d00…
- plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Posts.php
- plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/functions.php
- plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Members.php
- plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Actions.php
- plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/hooks.php
- plugins.trac.wordpress.org/changeset
Frequently asked questions
- What is CVE-2026-91092?
- CVE-2026-91092 is a medium-severity vulnerability in Tomdever Wpforo Forum, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-22.
- How severe is CVE-2026-91092?
- Medium severity. CVSS v3 base score is 4.3 out of 10.