Vulnerability · Published Dec 5, 2025 · Assigned by Wordfence

CVE-2025-13512CoSign Single Signon <= 0.3.1 - Reflected Cross-Site Scripting via $_SERVER['PHP_SELF']

Medium 6.1

In plain English

A medium-severity cross-site scripting in CoSign Single Signon from jiangxin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 81.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
jiangxin	CoSign Single Signon	0 – through 0.3.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References