CVE-2026-28556 wpForo Forum 2.4.14 Missing Authorization via Topic Management Form Handlers
Authenticated subscribers can move, merge, or split arbitrary forum topics without moderator permissions, allowing unauthorized content reorganization.
- 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-2026-28556?
CVE-2026-28556 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 move, merge, or split any forum topic via the topic_move, topic_merge, and topic_split form action handlers. Attackers with a valid form nonce can reorganize arbitrary forum content without moderator permissions, including relocating topics to private forums.
Weakness: CWE-862
Which versions are affected by CVE-2026-28556?
It affects 1 product.
Products include Gvectors Wpforo Forum.
How do I fix CVE-2026-28556?
No fix has been published for CVE-2026-28556 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-2026-28556 being exploited?
There is no known exploitation of CVE-2026-28556 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-rw6w-6q2w-c8g8.