EUVD-2026-27474Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from Vendor (mitre) · only source for this CVE.
CVSS VectorVendor: mitre
Lifecycle Timeline
2DescriptionCVE.org
FluentCMS 1.2.3 is vulnerable to Cross Site Scripting (XSS) in TextHTML plugin.
AnalysisAI
Reflected cross-site scripting (XSS) in FluentCMS 1.2.3 TextHTML plugin allows unauthenticated remote attackers to inject malicious scripts into web pages viewed by other users via specially crafted requests. The vulnerability requires user interaction (clicking a malicious link) and affects confidentiality and integrity with a CVSS score of 6.1, but is not currently exploited in the wild and carries negligible exploitation probability per EPSS.
Technical ContextAI
The vulnerability exists in the TextHTML plugin component of FluentCMS, a content management system. The root cause is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), indicating insufficient input validation or output encoding in the plugin's HTML rendering logic. The TextHTML plugin likely processes user-supplied HTML or markup without proper sanitization before displaying it to other users, allowing attackers to inject arbitrary JavaScript that executes in the context of the victim's browser session.
RemediationAI
The primary remediation is to upgrade FluentCMS to a patched version beyond 1.2.3. However, no specific patched version number is confirmed in the available advisory data; consult the official FluentCMS repository (https://github.com/fluentcms/FluentCMS/issues/2405) for the exact fix version and release date. As an interim workaround, disable or restrict access to the TextHTML plugin if it is not critical to operations, as this directly addresses the vulnerable component. Alternatively, implement a Web Application Firewall (WAF) rule that detects and blocks reflected XSS payloads in requests to FluentCMS endpoints, though this is less reliable than patching. Restrict user permissions to the TextHTML plugin editing interface to trusted administrators only, reducing the attack surface. Apply context-aware output encoding to all HTML content rendered by the plugin to ensure user input is properly escaped; this may require code-level fixes if not addressed in vendor patches.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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