CVE-2026-11434 FluentCMS Blocks Plugin blocks cross site scripting
Remote attackers can execute arbitrary scripts via the Blocks Plugin admin interface, potentially compromising user accounts.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-11434?
CVE-2026-11434 is a medium-severity cross-site scripting vulnerability in FluentCMS, published on 6 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
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.
Which versions are affected by CVE-2026-11434?
How do I fix CVE-2026-11434?
No fix has been published for CVE-2026-11434 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-11434 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11434 exists.
Sources
Also known as GHSA-gp2j-q325-2c8q.