EUVD-2026-36746
GHSA-rgj4-4278-rc2j
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Network-reachable XSS injection requires no authentication; scope change captures script execution in admin browser context; no availability impact applies.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
2DescriptionCVE.org
PublicCMS V5.202506.d has a Cross Site Scripting (XSS) vulnerability in the site configuration management module.
AnalysisAI
Cross-site scripting in PublicCMS V5.202506.d allows unauthenticated network-accessible attackers to inject malicious scripts via the site configuration management module, which execute in the browser of any user who subsequently views the affected page. The CVSS scope change (S:C) indicates injected code escapes the vulnerable component's security context, making administrator session hijacking the primary realistic impact. A proof-of-concept is publicly available on GitHub Gist per SSVC classification, though EPSS remains very low at 0.15% (4th percentile) and the vulnerability is absent from the CISA Known Exploited Vulnerabilities catalog.
Technical ContextAI
CWE-79 (Improper Neutralization of Input During Web Page Generation) identifies the root cause: user-supplied input incorporated into dynamically rendered web pages without adequate output encoding. PublicCMS is a Java-based open-source content management system; the vulnerable surface is the site configuration management interface, where attacker-controlled data is rendered without sanitization. The CVSS scope change (S:C) is characteristic of stored or reflected XSS payloads that execute in a browser security context outside the immediate vulnerable component - most relevantly, in the session of an authenticated administrator who views the tainted configuration. CPE data in the NVD record is listed as n/a, so precise component-level scoping is unavailable and versioning is limited to what the CVE description states: V5.202506.d.
RemediationAI
No vendor-released patch has been identified at time of analysis; the only available reference is a proof-of-concept GitHub Gist rather than a vendor security advisory. As a compensating control, administrators should restrict access to the site configuration management module via network-layer enforcement - firewall rules, VPN-only access, or IP allowlisting - accepting the operational trade-off of reduced remote administrative flexibility. Deploying a web application firewall with XSS detection rules can intercept common payload patterns before they reach the application, though WAF rules are bypassable and should not be treated as a complete fix. Content Security Policy (CSP) headers, if configurable in PublicCMS, can limit the impact of successful XSS injection by restricting where scripts may execute. Administrators should monitor the PublicCMS project repository and the ENISA EUVD entry (EUVD-2026-36746) for an official patch release.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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