CVE-2026-75528
Received Received - Intake

Stored XSS in Broken Link Checker WordPress Plugin

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Wordfence

Description
The Broken Link Checker plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author URL / Link Log in all versions up to, and including, 2.4.13 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires an administrator to perform the plugin's standard dismiss-and-recheck workflow on a link submitted by the attacker via the WordPress comment author URL field, after which the attacker's HTTP server issues a redirect to a URL containing an HTML/JavaScript payload that is stored verbatim in the link log.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-75528
EUVD
EUVD-2026-69889

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wordfence broken_link_checker to 2.4.13 (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

This is a Stored Cross-Site Scripting (XSS) vulnerability in the Broken Link Checker WordPress plugin. It allows unauthenticated attackers to inject malicious scripts via the Comment Author URL field. The payload is stored in the plugin's link log and executes when a user accesses the infected page. Exploitation requires an administrator to trigger the plugin's link recheck process.

Detection Guidance

Check WordPress sites using the Broken Link Checker plugin for versions up to 2.4.13. Inspect comment author URLs and link logs for suspicious HTML/JavaScript payloads. Review server logs for redirects to unexpected URLs.

Impact Analysis

Attackers could steal user sessions, redirect visitors to malicious sites, or perform actions on their behalf. Website visitors may have their data compromised if they interact with the injected scripts. Administrators risk unauthorized access to the WordPress dashboard if the payload escalates privileges.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Organizations may face fines or penalties for failing to protect user data from unauthorized access or exfiltration.

Mitigation Strategies

Update the Broken Link Checker plugin to the latest version. Disable the plugin if no update is available. Remove any malicious comments or links from the link log. Monitor for unauthorized script execution.

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