CVE-2026-50635

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.

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Produits concernés

• LimeSurvey

Scores CVSS

Faiblesses (CWE)

• CWE-640

Références

• https://github.com/LimeSurvey/LimeSurvey/pull/5032
• https://www.limesurvey.org/
• https://www.vulncheck.com/advisories/limesurvey-password-reset-host-header-injection-discloses-reset-token

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories