CVE-2026-91092
Received Received - Intake

Authorization Bypass in wpForo Forum Plugin

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: Wordfence

Description
The wpForo Forum plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over another guest author's forum post and modify its title, body, author name, and stored owner email address. This requires that guest posting and editing are enabled on the forum, and that the attacker knows the target guest author's email address.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-22
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-91092
EUVD
EUVD-2026-84304

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wpforo wpforo to 3.1.5 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

The wpForo Forum plugin for WordPress has an authorization bypass flaw in versions up to 3.1.5. This allows authenticated attackers with subscriber-level access or higher to take over guest authors' forum posts. They can modify the post's title, body, author name, and stored owner email address if guest posting and editing are enabled and the attacker knows the target's email address.

Detection Guidance

Check if the wpForo plugin version is up to 3.1.5 or lower. Inspect WordPress logs for unauthorized post modifications by subscribers. Look for forum settings where guest posting and editing are enabled. Verify if user email addresses are exposed in forum metadata.

Impact Analysis

If you use the vulnerable wpForo plugin, an attacker could hijack your forum posts, change their content, or impersonate you as the author. This could damage your reputation, spread misinformation, or disrupt forum discussions. The attack requires only subscriber-level access and knowledge of your email address.

Compliance Impact

This vulnerability could lead to unauthorized modifications of user-generated content, potentially violating data integrity principles in GDPR and HIPAA. If user posts are altered without consent, it may constitute a breach of confidentiality or integrity requirements under these regulations.

Mitigation Strategies

Update the wpForo Forum plugin to the latest version beyond 3.1.5 to patch the authorization bypass vulnerability. Disable guest posting and editing features if not required. Review forum posts for unauthorized changes and revert any malicious modifications.

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