XSS in Jiangxin Cosign Single Signon
CVE-2025-13512
The CoSign Single Signon plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `$_SERVER['PHP_SELF']` parameter in all versions up to, and including, 0.3.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (12.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Jiangxin Cosign Single Signon — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-13512?
- CVE-2025-13512 is a medium-severity vulnerability in Jiangxin Cosign Single Signon, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-12-05.
- How severe is CVE-2025-13512?
- Medium severity. CVSS v3 base score is 6.1 out of 10.