CVE-2026-129134

EUVD-2026-125545
MRBS before 1.13.0 contains a password reset poisoning vulnerability that allows unauthenticated attackers to redirect reset links by forging the Host header when $url_base is unset. Attackers can request a reset for a victim so AuthDb::notifyUser() emails a link pointing to their host, capturing the reset key when opened to take over accounts including administrators.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/meeting-room-booking-system/mrbs-code/blob/299686ed64174a66448699f5ca0fb5e0e0ea9faa/web/lib/MRBS/Auth/AuthDb.php#L613
https://github.com/meeting-room-booking-system/mrbs-code/commit/92f6f5610072ddb9e1b38074c410fc8be56947ed
https://github.com/meeting-room-booking-system/mrbs-code/releases/tag/v1.13.0
https://github.com/meeting-room-booking-system/mrbs-code/security/advisories/GHSA-73cv-hx7f-9v27
https://www.vulncheck.com/advisories/mrbs-before-1.13.0-password-reset-poisoning-via-host-header-injection