What’s Vulnerable › Vulnerabilities

CVE-2023-0926: Custom Permalinks <= 2.6.0 - Authenticated(Editor+) Stored Cross-Site Scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-24 · updated 2026-06-17
• Weakness: CWE-79

Description

The Custom Permalinks plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.6.0 due to insufficient input sanitization and output escaping on tag names. This allows authenticated users, with editor-level permissions or greater to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, even when 'unfiltered_html' has been disabled.

Affected products

• sasiddiqui Custom Permalinks: before 2.7.0 — fixed in 2.7.0

How to fix

Upgrade to a fixed version: sasiddiqui Custom Permalinks 2.7.0. Check the vendor advisory for mitigations.

References

• https://github.com/samiahmedsiddiqui/custom-permalinks/pull/96
• https://plugins.trac.wordpress.org/changeset/3138206/custom-permalinks/trunk/admin/class-custom-permalinks-post-types-table.php
• https://plugins.trac.wordpress.org/changeset/3138206/custom-permalinks/trunk/admin/class-custom-permalinks-taxonomies-table.php
• https://wordpress.org/plugins/custom-permalinks/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/97f8549a-292d-4a6d-8ec0-550467e5cf0f?source=cve

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