Browser script execution via unencoded URL paths
Published Nov 6, 2025 · Updated Nov 6, 2025
Reflected XSS in CMSimple_XH 1.8 allows remote attackers to execute JavaScript in a victim's browser through a crafted URL path. The index.php front controller passes attacker-controlled path segments into template rendering without HTML-encoding them in link and form attributes. Exploitation requires a victim to visit the crafted URL; the injected script then runs in that browser context and can read or alter client-accessible page data.
Summary
What happened
Reflected XSS in CMSimple_XH 1.8 allows remote attackers to execute JavaScript in a victim's browser through a crafted URL path. The index.php front controller passes attacker-controlled path segments into template rendering without HTML-encoding them in link and form attributes. Exploitation requires a victim to visit the crafted URL; the injected script then runs in that browser context and can read or alter client-accessible page data.
The record
- CVE
- CVE-2025-63589
- Published
- Nov 6, 2025
- Updated
- Nov 6, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 6, 2025CVE publishedPublication date reported by the CVE source.
- Nov 6, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- CyberCrew CMSimple_XH reflected XSS proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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