CVE-2026-91849 WuzhiCMS Avatar Upload index.php setAvatar unrestricted upload
Attackers can upload malicious files via the avatar upload feature in WuzhiCMS, potentially leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91849?
CVE-2026-91849 is a medium-severity vulnerability in WuzhiCMS, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in WuzhiCMS up to 4.1.0. This affects the function member::setAvatar of the file /index.php?m=member&f=user&v=setAvatar of the component Avatar Upload. The manipulation of the argument File results in unrestricted upload. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-91849?
How do I fix CVE-2026-91849?
No fix has been published for CVE-2026-91849 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-91849 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91849 exists.
Sources
Also known as GHSA-rhh7-mmrm-695f.