Description
An unauthenticated reflected cross-site scripting vulnerability in the query handling of CMSimpleXH allows remote attackers to inject and execute arbitrary JavaScript in a victim's browser via a crafted request (e.g., a maliciously crafted POST login). Successful exploitation may lead to theft of session cookies, credential disclosure, or other client-side impacts.
Affected products
cmsimple-xh: cmsimple xh
References3
- github.com/cybercrewinc/CVE-2025-63588 ExploitThird Party Advisory
- github.com/cybercrewinc/CVE-2025-63588 ExploitThird Party Advisory
- helloandrewpaul.medium.com/reflected-xss-in-login-form-email-pa… Not Applicable
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N - EPSS — exploit probability
- 0% percentile: 30 · as of 10 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.