CVE-2020-36948 VestaCP 0.9.8-26 - 'LoginAs' Insufficient Session Validation
Remote attackers can bypass authentication in VestaCP to access user accounts and perform unauthorized actions due to insufficient session token validation.
- 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-2020-36948?
CVE-2020-36948 is a high-severity authentication bypass vulnerability in VestaCP, published on 27 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
VestaCP 0.9.8-26 contains a session token vulnerability in the LoginAs module that allows remote attackers to manipulate authentication tokens. Attackers can exploit insufficient token validation to access user accounts and perform unauthorized login requests without proper administrative permissions.
Weakness: CWE-863
Which versions are affected by CVE-2020-36948?
How do I fix CVE-2020-36948?
No fix has been published for CVE-2020-36948 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-2020-36948 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36948 exists.
Sources
Also known as GHSA-pxpj-pwq4-m64x.