EUVD-2026-19340
GHSA-hj9c-p59c-vqph
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
3DescriptionNVD
An authenticated stored cross-site scripting (XSS) vulnerability in the creation/editing module of Feehi CMS v2.1.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Content field.
AnalysisAI
Stored cross-site scripting (XSS) in Feehi CMS v2.1.1 allows authenticated attackers to inject malicious scripts into the Content field during page/post creation or editing, which execute in the browsers of other users viewing the affected content. The vulnerability requires user interaction (UI:R) and authenticated access (PR:L), limiting its severity to CVSS 5.4 (medium). No public exploit code or active exploitation has been identified; EPSS score of 0.02% indicates extremely low real-world exploitation probability despite public disclosure.
Technical ContextAI
Feehi CMS is a PHP-based content management system. The vulnerability stems from insufficient input validation and output encoding in the Content field handler during create/edit operations for pages or posts. CWE-79 (Improper Neutralization of Input During Web Page Generation) indicates the application fails to properly sanitize or encode user-supplied input before reflecting or storing it in HTML context. An authenticated attacker can inject arbitrary HTML tags or JavaScript code (e.g., <script>, <img onerror>, <iframe>) into the Content field; because the CMS stores this payload and renders it without proper escaping when other users or administrators view the page, the attacker's script executes in their browser context with access to their session cookies and page-specific data.
RemediationAI
Update Feehi CMS to a version newer than 2.1.1 that includes input validation and output encoding fixes for the Content field. Consult the official Feehi CMS GitHub repository (https://github.com/liufee/cms) and issue tracker (https://github.com/liufee/cms/issues/80) for patch availability and release notes. As an interim workaround, restrict Content field editing to trusted administrators only and implement a Web Application Firewall (WAF) rule to block script tags in POST requests to content creation/edit endpoints. Additionally, enable Content Security Policy (CSP) headers to mitigate XSS impact even if malicious payloads are stored.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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