CVE-2025-4579: WP Content Security Plugin <= 2.3 - Unauthenticated Stored Cross-Site Scripting via CSP-Report Fields
Description
The WP Content Security Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the blocked-uri and effective-directive parameters in all versions up to, and including, 2.3 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.
Classification
CVE ID: CVE-2025-4579
CVSS Base Severity: HIGH
CVSS Base Score: 7.2
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Problem Types
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Affected Products
Vendor: dyland
Product: WP Content Security Plugin
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.12% (probability of being exploited)
EPSS Percentile: 31.31% (scored less or equal to compared to others)
EPSS Date: 2025-06-06 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-4579https://www.wordfence.com/threat-intel/vulnerabilities/id/f3c4ba08-a9fa-439a-a887-b8c113f78e20?source=cve
https://plugins.trac.wordpress.org/browser/wp-content-security-policy/tags/2.3/includes/WP_CSP.php#L597
https://plugins.trac.wordpress.org/browser/wp-content-security-policy/tags/2.3/includes/WP_CSP.php#L612
https://plugins.trac.wordpress.org/browser/wp-content-security-policy/tags/2.3/includes/WP_CSP.php#L659