EUVD-2026-42655
GHSA-8h66-74hr-gcf7
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (vuldb) · only source for this CVE.
CVSS VectorVendor: vuldb
Lifecycle Timeline
1DescriptionCVE.org
A security vulnerability has been detected in YzmCMS up to 7.5. Affected is the function get_url of the file /yzmphp/yzmphp.php of the component Header Handler. The manipulation of the argument HTTP_HOST leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Cross-site scripting in YzmCMS through version 7.5 allows unauthenticated remote attackers to inject and execute arbitrary JavaScript by manipulating the HTTP Host header processed by the get_url function in /yzmphp/yzmphp.php. The Header Handler component reflects the attacker-controlled HTTP_HOST value into generated page output without sanitization, enabling payload execution in a victim's browser upon page visit. A public proof-of-concept exploit has been disclosed; no patch exists and the vendor did not respond to coordinated disclosure, leaving all deployments at or below v7.5 exposed.
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External POC / Exploit Code
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