Auth bypass in Gvectors Wpforo Forum
CVE-2026-28554
wpForo Forum 2.4.14 contains a missing authorization vulnerability that allows authenticated subscribers to approve or unapprove any forum post via the wpforo_approve_ajax AJAX handler. Attackers exploit the nonce-only check by submitting a valid nonce with an arbitrary post ID to bypass moderation controls entirely.
Vulnerability class: Broken Access Control
EPSS: 0.003 (18.8th percentile) — read the EPSS interpretation.
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.
Affected products
- Gvectors Wpforo_forum
- Gvectors Team Wpforo Forum — versions 2.4, 2.4.16
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Release Notes, patch)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-28554?
- CVE-2026-28554 is a medium-severity vulnerability in Gvectors Wpforo Forum, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-02-28.
- How severe is CVE-2026-28554?
- Medium severity. CVSS v3 base score is 4.3 out of 10.