CVE-2026-5254 welovemedia FFmate Webhook AppJsonTreeView.vue cross site scripting
Remote attackers can execute arbitrary scripts via the Webhook Handler component in FFmate, potentially compromising user sessions or data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-5254?
CVE-2026-5254 is a medium-severity cross-site scripting vulnerability in welovemedia FFmate, published on 1 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A security vulnerability has been detected in welovemedia FFmate up to 2.0.15. Affected by this issue is some unknown functionality of the file /ui/app/components/AppJsonTreeView.vue of the component Webhook Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-5254?
How do I fix CVE-2026-5254?
No fix has been published for CVE-2026-5254 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-2026-5254 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5254 exists.
Sources
Also known as GHSA-hjf3-5wh2-p9qw.