SB2025052623 - Stored cross-site scripting in Slim SEO plugin for WordPress
Published: May 26, 2025
Security Bulletin ID
SB2025052623
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Stored cross-site scripting (CVE-ID: CVE-2025-4611)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the slim_seo_breadcrumbs shortcode. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install update from vendor's website.
References
- https://github.com/elightup/slim-seo/commit/b475dceff3a6bd94335d5a79eb12cdd92e2c8350
- https://plugins.trac.wordpress.org/browser/slim-seo/tags/4.5.3/src/Breadcrumbs.php#L109
- https://plugins.trac.wordpress.org/browser/slim-seo/tags/4.5.3/src/Breadcrumbs.php#L37
- https://plugins.trac.wordpress.org/browser/slim-seo/tags/4.5.3/src/Breadcrumbs.php#L85
- https://plugins.trac.wordpress.org/changeset/3296099/
- https://wordpress.org/plugins/slim-seo/#developers
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6318a1cf-716f-450c-a1c2-497de8095daa?source=cve