Vulnerability · Published Jun 6, 2026 · Assigned by VulDB

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

Low 2.4

In plain English

A low-severity cross-site scripting in FluentCMS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)2.4Low

Exploit odds (30 days)0.3%top 80.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
n/a	FluentCMS	0.0.5

Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R

References

VDB-369014 | FluentCMS Blocks Plugin blocks cross site scripting vdb-entry
VDB-369014 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-11434 | CVE Analysis and Report third-party-advisory
Submit #821094 | FluentCMS 0.0.5 Cross Site Scripting third-party-advisory
https://karinagante.github.io/cve-2026-11434/ related
https://karinagante.github.io/cve-2026-11434/#proof-of-concept-poc exploit
https://hackmd.io/@noka/BkHdIMFAWx related