CVE-2026-5252 z-9527 admin Message Create Endpoint message.js cross site scripting
Remote attackers can execute arbitrary scripts via the Message Create Endpoint in z-9527 admin, potentially leading to session hijacking or malicious actions.
- 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-2026-5252?
CVE-2026-5252 is a medium-severity cross-site scripting vulnerability in z-9527 admin, 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 flaw has been discovered in z-9527 admin 1.0/2.0. Affected is an unknown function of the file /server/routes/message.js of the component Message Create Endpoint. Performing a manipulation results in cross site scripting. The attack can be initiated remotely. The exploit has been released to the public and may 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-2026-5252?
How do I fix CVE-2026-5252?
No fix has been published for CVE-2026-5252 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-2026-5252 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5252 exists.
Sources
Also known as GHSA-4c6f-f3m2-g3pw.