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Vulnerability record · CVE-2026-75528 · published 2 September 2026

CVE-2026-75528: Cross-site scripting vulnerability

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.

7.2 CVSS 3.1 High EPSS 0.53% · top 57.6% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
13References
2 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.13/legacy/includes/admin/table-printer.php#L658
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.13/legacy/includes/links.php#L485
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.13/legacy/modules/checkers/http.php#L291
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.13/legacy/modules/checkers/http.php#L432
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.13/legacy/modules/containers/comment.php#L228
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.8/legacy/includes/admin/table-printer.php#L658
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.8/legacy/includes/links.php#L485
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.8/legacy/modules/checkers/http.php#L291
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.8/legacy/modules/checkers/http.php#L432
https://plugins.trac.wordpress.org/browser/broken-link-checker/tags/2.4.8/legacy/modules/containers/comment.php#L228
https://plugins.trac.wordpress.org/changeset?old_path=%2Fbroken-link-checker/tags/2.4.13&new_path=%2Fbroken-link-checker
https://plugins.trac.wordpress.org/changeset?reponame=&new=3662785%40broken-link-checker%2Ftags%2F2.4.13.1&old=3644192%4
https://www.wordfence.com/threat-intel/vulnerabilities/id/ec96308f-3944-48c5-94be-b1555c0830b7?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-75528), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.