8.8
/ 10
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
AI Analysis
LimeSurvey password reset host header injection vulnerability allows an attacker to disclose a valid reset token and take over an account
Basic Information
ID
CVE-2026-50635
Source
VulnCheck
Published
Jun 9, 2026 at 17:34
Affected Product
Vendor
LimeSurvey
Product
LimeSurvey
Affected Versions
LimeSurvey LimeSurvey 0
CWE Classification
AI Assessment
AI Score
8.8 / 10
AI Severity
High
Vendor
LimeSurvey
Product
LimeSurvey