Description
LimeSurvey constructs account password-reset links from the client-supplied HTTP Host header without validating it. The optional allowedHosts allowlist that would constrain this is undefined in the default (and documented) configuration, so LSHttpRequest::checkIsAllowedHost() results in no operation. A remote, unauthenticated attacker who submits a forgotten-password request for a known account (requiring only the target's username and email) with a spoofed Host header causes LimeSurvey to email that account a reset link whose hostname is attacker-controlled while embedding the genuine validation_key. When the recipient or an automated inbound mail-security link scanner dereferences the link, the valid reset token is disclosed to the attacker, who replays it against the legitimate host's newPassword endpoint to set a new password and take over the account.
Problem types
Weak Password Recovery Mechanism for Forgotten Password
Product status
Any version
7.0.1 (custom)
Credits
McCaulay Hudson (@_McCaulay) of watchTowr
References
github.com/LimeSurvey/LimeSurvey/pull/5032 (GitHub Pull Request 5032)
www.limesurvey.org/ (Official Product Homepage)
www.vulncheck.com/...-header-injection-discloses-reset-token (VulnCheck Advisory: LimeSurvey Password Reset Host Header Injection Discloses Reset Token)