CVE-2026-11434: FluentCMS Blocks Plugin blocks cross site scripting

Severity: low (CVSS 2.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-06 · updated 2026-07-23
Weakness: CWE-79

Description

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.

Affected products

FluentCMS: 0.0.5

References

https://hackmd.io/@noka/BkHdIMFAWx
https://karinagante.github.io/cve-2026-11434/
https://karinagante.github.io/cve-2026-11434/#proof-of-concept-poc
https://vuldb.com/cve/CVE-2026-11434
https://vuldb.com/submit/821094
https://vuldb.com/vuln/369014
https://vuldb.com/vuln/369014/cti

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