CVE-2025-30064 Possibility to generate a session for any user via the "ex:action" parameter after obtaining access to the JWT key
Attackers can generate sessions for any user by exploiting JWT algorithm confusion in the VerifyUserByThrustedService function.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-30064?
CVE-2025-30064 is a high-severity authentication bypass vulnerability in CGM CLININET, published on 27 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An insufficiently secured internal function allows session generation for arbitrary users. The decodeParam function checks the JWT but does not verify which signing algorithm was used. As a result, an attacker can use the "ex:action" parameter in the VerifyUserByThrustedService function to generate a session for any user.
Which versions are affected by CVE-2025-30064?
How do I fix CVE-2025-30064?
No fix has been published for CVE-2025-30064 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-2025-30064 being exploited?
There is no known exploitation of CVE-2025-30064 in the wild and no public exploit code.
Sources
Also known as GHSA-qhgj-gg86-h6q2.