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CVE-2025-63588

HighPublished

An unauthenticated reflected cross-site scripting vulnerability in the query handling of CMSimpleXH allows remote attackers to inject and execute arbitrary...

Published: Nov 6, 2025
Updated: Nov 6, 2025
Assigning CNA: mitre
Evidence observed: Aug 6, 2026

Primary CVSS

7.1/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 26.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2025-63588PoC
Detailed proof-of-concept for CVE-2025-63588, a reflected XSS vulnerability in CMSimple_XH 1.8, with CVSS scoring, impact analysis, and secure coding remediation example.

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