CVE-2026-15021
Received Received - Intake

Stored XSS in wpForo Forum WordPress Plugin

Publication date: 2026-07-16

Last updated on: 2026-07-16

Assigner: Wordfence

Description
The wpForo Forum plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'location' Profile Field in all versions up to, and including, 3.1.1 due to insufficient input sanitization and output escaping. 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. The sanitize_text_field() function applied at input does not encode double quotes, allowing attribute breakout via a payload that escapes the href attribute context and injects event handler attributes.

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Meta Information

Published
2026-07-16
Last Modified
2026-07-16
Generated
2026-07-16
AI Q&A
2026-07-16
EPSS Evaluated
N/A
NVD
CVE-2026-15021
EUVD
EUVD-2026-44899

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wpforo wpforo_forum_plugin to 3.1.1 (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 the 'location' Profile Field. This flaw exists in versions up to and including 3.1.1 due to insufficient input sanitization and output escaping. Attackers with subscriber-level access or higher can inject malicious scripts into pages. These scripts execute when users view the affected pages.

Detection Guidance

Check WordPress installations for the wpForo Forum plugin versions up to and including 3.1.1. Inspect user profile fields for unusual or obfuscated JavaScript in the 'location' field. Review server logs for unexpected script executions or modifications to WordPress pages.

Impact Analysis

If exploited, this vulnerability allows attackers to steal user sessions, perform actions on behalf of users, or deface websites. Users with access to the forum could have their accounts compromised. Malicious scripts may also redirect users to phishing sites or deliver malware.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements. It may result in data breaches, leading to legal penalties, reputational damage, and loss of trust. Organizations must address it to maintain compliance.

Mitigation Strategies

Update the wpForo Forum plugin to the latest version beyond 3.1.1. Remove or sanitize any existing malicious scripts in user profiles. Implement input validation for profile fields and restrict subscriber-level access to sensitive functions.

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