Vulnerability in cotonti

[ Description ]Official description

Cotonti through 1.0.0 generates registration and email-change validation tokens with md5(microtime()), allowing attackers to bypass email-ownership verification by predicting tokens. Attackers can derive the generation time from the HTTP Date header and compute candidate tokens offline. They then submit these tokens to the users.register.php validate handler to activate accounts or confirm email addresses they do not control.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/Cotonti/Cotonti
• github.com/Cotonti/Cotonti/blob/1.0.0/modules/users/inc/users.functions.php
• github.com/Cotonti/Cotonti/blob/1.0.0/modules/users/inc/users.profile.php
• github.com/Cotonti/Cotonti/blob/1.0.0/modules/users/inc/users.register.php
• github.com/Cotonti/Cotonti/issues/1904
• github.com/Cotonti/Cotonti/pull/1905
• www.vulncheck.com/advisories/cotonti-through-1.0.0-predictable-validation-tokens-via-md…