CVE-2025-15099 simstudioai sim CRON Secret internal.ts improper authentication

Medium 6.9 Published 26 Dec 2025 Updated 26 Dec 2025

Attackers can bypass authentication in the CRON Secret Handler by manipulating the internal API secret, requiring a patch to secure the application.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-15099?

CVE-2025-15099 is a medium-severity authentication bypass vulnerability in simstudioai sim, published on 26 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability was identified in simstudioai sim up to 0.5.27. This vulnerability affects unknown code of the file apps/sim/lib/auth/internal.ts of the component CRON Secret Handler. The manipulation of the argument INTERNAL_API_SECRET leads to improper authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The identifier of the patch is e359dc2946b12ed5e45a0ec9c95ecf91bd18502a. Applying a patch is the recommended action to fix this issue.

Weakness: CWE-287

Which versions are affected by CVE-2025-15099?

It affects 1 product.

Products include Sim Sim.

How do I fix CVE-2025-15099?

No fix has been published for CVE-2025-15099 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2025-15099 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15099 exists.

Sources

Also known as GHSA-2hg8-9339-xpwg.