{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50635","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-06-05T11:53:55.168Z","datePublished":"2026-06-09T17:34:30.992Z","dateUpdated":"2026-06-23T16:16:45.610Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-06-23T16:16:45.610Z"},"title":"LimeSurvey Password Reset Host Header Injection Discloses Reset Token","descriptions":[{"lang":"en","value":"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."}],"datePublic":"2026-06-09T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-640","description":"Weak Password Recovery Mechanism for Forgotten Password","type":"CWE"}]}],"affected":[{"vendor":"LimeSurvey","product":"LimeSurvey","defaultStatus":"unknown","versions":[{"version":"0","lessThanOrEqual":"7.0","status":"affected","versionType":"custom"},{"status":"unaffected","version":"7.0.1","versionType":"custom"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:limesurvey:limesurvey:*:*:*:*:*:*:*:*","versionEndIncluding":"7.0"}]}]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","version":"3.1","baseSeverity":"HIGH","baseScore":8.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"references":[{"url":"https://github.com/LimeSurvey/LimeSurvey/pull/5032","name":"GitHub Pull Request 5032","tags":["issue-tracking"]},{"url":"https://www.limesurvey.org/","name":"Official Product Homepage","tags":["product"]},{"name":"VulnCheck Advisory: LimeSurvey Password Reset Host Header Injection Discloses Reset Token","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/limesurvey-password-reset-host-header-injection-discloses-reset-token"}],"credits":[{"lang":"en","value":"McCaulay Hudson (@_McCaulay) of watchTowr","type":"finder"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-09T18:20:43.192036Z","id":"CVE-2026-50635","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-09T18:22:43.787Z"}}]}}