CVE-2026-28556
Authorization Bypass in wpForo Forum Allows Topic Manipulation
Publication date: 2026-02-28
Last updated on: 2026-03-04
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gvectors | wpforo_forum | From 2.4.0 (inc) to 2.4.16 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-862 | The product does not perform an authorization check when an actor attempts to access a resource or perform an action. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The vulnerability in wpForo Forum 2.4.14 is a missing authorization issue that allows authenticated subscribers to perform actions they should not be permitted to do. Specifically, these users can move, merge, or split any forum topic by exploiting the topic_move, topic_merge, and topic_split form action handlers.
Attackers who have a valid form nonce can reorganize forum content arbitrarily without needing moderator permissions, including moving topics into private forums.
How can this vulnerability impact me? :
This vulnerability can impact you by allowing unauthorized users with subscriber-level access to manipulate forum content in unintended ways. They can move, merge, or split topics without proper permissions, potentially disrupting forum organization and user experience.
Additionally, attackers can relocate topics to private forums, which may expose sensitive discussions or cause confusion among forum members.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know