RCE in Fluentcms
CVE-2026-11434
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 class: XSS (Cross-Site Scripting)
EPSS: 0.003 (19.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N.
Affected products
- N/a Fluentcms — versions 0.0.5
Weakness classification (CWE)
References
- cna@vuldb.com (related)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (related)
- cna@vuldb.com (exploit)
Frequently asked questions
- What is CVE-2026-11434?
- CVE-2026-11434 is a low-severity vulnerability in Fluentcms, classified under Cross-site Scripting. CVSS score: 2.4/10. Published 2026-06-06.
- How severe is CVE-2026-11434?
- Low severity. CVSS v3 base score is 2.4 out of 10.