CVE-2026-93747
Received Received - Intake

Stored XSS in wpForo Forum WordPress Plugin

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: Wordfence

Description
The wpForo Forum plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'telegram' profile field in versions up to, and including, 3.1.6. This is due to insufficient input sanitization and output escaping in the profile_update action — the raw $_POST['data'] array is copied into a $custom_fields variable before validate() and sanitize() run, both of which operate only on a parallel $user reference, leaving $custom_fields unsanitized when it is persisted via update_custom_fields(); on render, wpforo_decode() reverses the entity encoding and the value is echoed without escaping in field_wrap_profile(). This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-93747
EUVD
EUVD-2026-86591

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
wpforo wpforo_forum to 3.1.6 (inc)
wpforo wpforo to 3.1.6 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

The wpForo Forum plugin for WordPress has a stored cross-site scripting (XSS) vulnerability in versions up to 3.1.6. It occurs in the 'telegram' profile field due to insufficient input sanitization and output escaping. Attackers with subscriber-level access or higher can inject malicious scripts that execute when other users view the page.

Detection Guidance

Check for the presence of the wpForo Forum plugin version 3.1.6 or lower. Inspect WordPress user profiles for unsanitized 'telegram' field entries containing suspicious scripts. Review server logs for unusual activity from subscriber-level accounts.

Impact Analysis

An attacker could steal user sessions, redirect users to malicious sites, or perform actions on their behalf. This could lead to unauthorized access to sensitive data, account takeovers, or spreading malware to other users visiting the forum.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR's integrity and confidentiality requirements. For HIPAA, it may expose protected health information, risking compliance with security and privacy rules. Organizations could face fines or legal penalties.

Mitigation Strategies

Update the wpForo Forum plugin to the latest version. Remove or sanitize any existing malicious 'telegram' field entries in user profiles. Implement stricter input validation for user-submitted data.

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