CVE-2025-13512
CoSign Single Signon <= 0.3.1 - Reflected Cross-Site Scripting via $_SERVER['PHP_SELF']
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
The CoSign Single Signon plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `$_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.
| CWE | CWE-79 |
| Vendor | jiangxin |
| Product | cosign single signon |
| Published | Dec 5, 2025 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
jiangxin / CoSign Single Signon
0 ≤ 0.3.1
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/0bbeab52-59a9-4d8d-8e3e-ebcbbca9816b?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cosign-sso/trunk/cosign-sso.php#L423 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cosign-sso/tags/0.3.1/cosign-sso.php#L423
Credits
Abdulsamad Yusuf