Vulnerability · Published Aug 20, 2026 · Assigned by CERT-PL
CVE-2026-64964Generation of Predictable Email Confirmation Token in ATutor
Medium 6.3
In plain English
A medium-severity security flaw in ATutor from ATutor. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Official description
ATutor generates predictable email confirmation tokens due to the use of insufficiently random values in the account confirmation functionality. Due to the use of predictable values related to user registration, an attacker who knows or can predict these values can guess valid account activation tokens. This allows an attacker to activate an unconfirmed account without access to the victim's email inbox. 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.
Affected products (as reported)
Weakness: CWE-340 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://cert.pl/en/posts/2026/08/CVE-2026-64960 third-party-advisory
- https://atutor.github.io/ product