CVE-2025-70842
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
A Stored Cross-Site Scripting (XSS) vulnerability was discovered in the File Management module of FluentCMS 1.2.3. The flaw allows an authenticated administrator to upload crafted SVG files containing malicious JavaScript code. Once uploaded, the script executes in the browser of any user who accesses the direct URL of the image, including unauthenticated visitors.
Risk Assessment
The malicious script can execute in the browsers of many users, including unauthenticated ones, potentially leading to session or data theft or actions performed on behalf of victims.
Recommendation
Update FluentCMS to a version containing the fix or implement validation and sanitization of uploaded SVG files and restrict their execution.
Other vulnerabilities in FluentCMS
See all- CVE-2026-86271Medium
Missing authorization vulnerability in FluentCMS up to 0.0.5, affecting the GetAccessible function in PermissionManager.cs. Manipulation results in missing authorization. The attack can be initiated remotely, and the exploit is public.
- CVE-2026-11434Low
A vulnerability in FluentCMS 0.0.5 in an unknown function of file /admin/blocks in the Blocks Plugin component leads to cross-site scripting (XSS). The attack can be initiated remotely. The exploit has been made public.
- CVE-2026-38947Medium
FluentCMS 1.2.3 is vulnerable to XSS in the TextHTML plugin. An attacker can inject malicious script that executes in the victim's browser.
- CVE-2025-67349Medium
A cross-site scripting (XSS) vulnerability was identified in FluentCMS 1.2.3. After logging in as an admin and navigating to the "Add Page" function, the application fails to properly sanitize input in the <head> section, allowing remote attackers to inject arbitrary script tags.
Original NVD description (English source)
A Stored Cross-Site Scripting (XSS) vulnerability was discovered in the File Management module of FluentCMS 1.2.3. The flaw allows an authenticated administrator to upload crafted SVG files containing malicious JavaScript code. Once uploaded, the script executes in the browser of any user who accesses the direct URL of the image, including unauthenticated visitors.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS