CVE-2026-93868

Description

Cotonti through 1.0.0 derives password recovery validation tokens from md5(microtime()) in users.passrecover.php, creating a predictable token space of approximately one million values per second. Unauthenticated attackers can read the server Date header, precompute candidate tokens within a narrow time window, and probe them against the passrecover authentication endpoint to reset any account password including administrators.

References

• https://github.com/Cotonti/Cotonti
• https://github.com/Cotonti/Cotonti/blob/1.0.0/modules/users/inc/users.passrecover.php
• https://github.com/Cotonti/Cotonti/issues/1890
• https://github.com/Cotonti/Cotonti/pull/1898
• https://www.vulncheck.com/advisories/cotonti-through-1.0.0-predictable-password-recovery-token-via-weak-prng