PT-2025-22340 · WordPress · Slim Seo

Muhammad Yudha · Published 2025-05-21 · Updated 2025-05-26 · CVE-2025-4611

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions The Slim SEO – Fast & Automated WordPress SEO Plugin versions up to, and including, 4.5.3

Description The issue is related to Stored Cross-Site Scripting via the plugin's slim seo breadcrumbs shortcode due to insufficient input sanitization and output escaping on user-supplied attributes. This allows authenticated attackers with contributor-level access and above to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Recommendations For versions up to, and including, 4.5.3, update to a version that addresses the insufficient input sanitization and output escaping issue in the slim seo breadcrumbs shortcode. As a temporary workaround, consider restricting access to the slim seo breadcrumbs shortcode for users with contributor-level access and above until a patch is available.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-4611

Affected Products

Slim Seo

References · 11

• https://nvd.nist.gov/vuln/detail/CVE-2025-4611 · Security Note
• https://osv.dev/vulnerability/CVE-2025-4611 · Vendor Advisory
• https://github.com/elightup/slim-seo/commit/b475dceff3a6bd94335d5a79eb12cdd92e2c8350 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/6318a1cf-716f-450c-a1c2-497de8095daa?source=cve · Note
• https://wordpress.org/plugins/slim-seo/#developers · Note
• https://plugins.trac.wordpress.org/browser/slim-seo/tags/4.5.3/src/Breadcrumbs.php#L37 · Note
• https://plugins.trac.wordpress.org/browser/slim-seo/tags/4.5.3/src/Breadcrumbs.php#L85 · Note
• https://twitter.com/CVEnew/status/1925123630461243857 · Twitter Post
• https://plugins.trac.wordpress.org/browser/slim-seo/tags/4.5.3/src/Breadcrumbs.php#L109 · Note
• https://plugins.trac.wordpress.org/changeset/3296099 · Note
• https://twitter.com/UndercodeUpdate/status/1926823574808994304 · Twitter Post