CVE-2026-64961 Authentication Bypass in ATutor
Unauthenticated attackers can bypass authentication and log in as any user, including administrators, by exploiting uninitialized token validation variables.
- 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-2026-64961?
CVE-2026-64961 is a medium-severity authentication bypass vulnerability in ATutor, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ATutor is vulnerable to authentication bypass . Although a token validation check is present in the auto-login functionality, the values required for token validation remain uninitialized in certain code paths. An unauthenticated attacker who can determine a user's identifier and registration timestamp can generate a valid token and authenticate as an existing user, including administrator, without knowing the password.
Product is no longer actively supported and the vulnerabilities have not been fixed. Only version 2.2.4 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
Weakness: CWE-639
Which versions are affected by CVE-2026-64961?
How do I fix CVE-2026-64961?
No fix has been published for CVE-2026-64961 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-2026-64961 being exploited?
There is no known exploitation of CVE-2026-64961 in the wild and no public exploit code.
Sources
Also known as GHSA-xh7m-r4hc-cm86.