CVE-2026-11434
LowCVSS 2.4Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
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.
Risk Assessment
A remote attacker can inject a malicious script that executes in the administrator's browser, potentially leading to session hijacking or data theft.
Recommendation
Apply available patches immediately or temporarily disable the Blocks Plugin until a fix is released.
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-2026-38947Medium
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 weakness has been identified in FluentCMS 0.0.5. The impacted element is an unknown function of the file /admin/blocks of the component Blocks Plugin. This manipulation causes cross site scripting. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS