CVE-2025-9800 SimStudioAI sim HTML File route.ts import unrestricted upload

Medium 5.3 Published 1 Sep 2025 Updated 2 Sep 2025

Attackers can upload malicious HTML files via the import function, potentially leading to code execution or privilege escalation.

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-2025-9800?

CVE-2025-9800 is a medium-severity vulnerability in SimStudioAI sim, published on 1 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A weakness has been identified in SimStudioAI sim up to ed9b9ad83f1a7c61f4392787fb51837d34eeb0af. Affected by this issue is the function Import of the file apps/sim/app/api/files/upload/route.ts of the component HTML File Parser. Executing manipulation of the argument File can lead to unrestricted upload. The attack may be launched remotely. The exploit has been made available to the public and could be exploited. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. This patch is called 45372aece5e05e04b417442417416a52e90ba174. A patch should be applied to remediate this issue.

Weakness: CWE-434, CWE-284

Which versions are affected by CVE-2025-9800?

It affects 1 product.

Products include Sim Sim.

How do I fix CVE-2025-9800?

No fix has been published for CVE-2025-9800 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-9800 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9800 exists.

Sources

Also known as GHSA-g7mj-wwxq-p2gr.