CVE-2026-28555 wpForo Forum 2.4.14 Missing Authorization via Topic Close AJAX Handler
Authenticated subscribers can close or reopen any forum topic by bypassing moderator permission checks in the wpForo Forum plugin.
- 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-2026-28555?
CVE-2026-28555 is a medium-severity missing authorization vulnerability in gVectors Team wpForo Forum, published on 28 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
wpForo Forum 2.4.14 contains a missing authorization vulnerability that allows authenticated subscribers to close or reopen any forum topic via the wpforo_close_ajax handler. Attackers submit a valid nonce with an arbitrary topic ID to bypass the moderator permission requirement and disrupt forum discussions.
Weakness: CWE-862
Which versions are affected by CVE-2026-28555?
It affects 1 product.
Products include Gvectors Wpforo Forum.
How do I fix CVE-2026-28555?
No fix has been published for CVE-2026-28555 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-2026-28555 being exploited?
There is no known exploitation of CVE-2026-28555 in the wild and no public exploit code.
Other vulnerabilities in gVectors Team wpForo Forum
- CVE-2024-3200 wpForo Forum <= 2.3.3 - Authenticated (Contributor+) SQL Injection
- CVE-2022-40200 WordPress wpForo Forum plugin <= 2.0.9 - Auth. Arbitrary File Upload vulnerability
- CVE-2018-16613 Privilege escalation in n/a
- CVE-2026-28562 wpForo Forum 2.4.14 SQL Injection via Topics ORDER BY Parameter
- CVE-2023-2249 Server-side request forgery in wpForo Forum
Sources
Also known as GHSA-p3gr-x272-xrcv.