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5.3
wpForo Forum Subscribers Can Move or Merge Any Forum Topic
CVE-2026-28556
Summary
Authenticated subscribers can move, merge, or split any forum topic without permission. This can lead to unauthorized changes to the forum's content. Update to the latest version to fix this issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| gvectors | wpforo_forum | > 2.4.0 , <= 2.4.16 | – |
Original title
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 fo...
Original 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.
nvd CVSS3.1
5.4
nvd CVSS4.0
5.3
Vulnerability type
CWE-862
Missing Authorization
- https://wordpress.org/plugins/wpforo/ Product
- https://wordpress.org/plugins/wpforo/#developers Release Notes
- https://www.vulncheck.com/advisories/wpforo-forum-missing-authorization-via-topi... Third Party Advisory
Published: 28 Feb 2026 · Updated: 13 Mar 2026 · First seen: 6 Mar 2026