CVE-2026-129132

MEDIUM 4.2

MRBS before 1.13.0 LDAP Injection via AuthLdap.php Authentication Filter

CVSS Score

4.2

EPSS Score

0.0%

EPSS Percentile

0th

MRBS before 1.13.0 contains an LDAP injection vulnerability in web/lib/MRBS/Auth/AuthLdap.php that interpolates unescaped login usernames into DN search and group-membership filters. Attackers with valid directory credentials outside the required group can submit crafted usernames that make the group filter always true, bypassing access restrictions.

CWE	CWE-90
Vendor	meeting-room-booking-system
Product	mrbs-code
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

meeting-room-booking-system / mrbs-code

0 < 1.13.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/meeting-room-booking-system/mrbs-code/security/advisories/GHSA-r543-f38c-cq6v github.com: https://github.com/meeting-room-booking-system/mrbs-code/commit/92f6f5610072ddb9e1b38074c410fc8be56947ed github.com: https://github.com/meeting-room-booking-system/mrbs-code/releases/tag/v1.13.0 github.com: https://github.com/meeting-room-booking-system/mrbs-code/blob/299686ed64174a66448699f5ca0fb5e0e0ea9faa/web/lib/MRBS/Auth/AuthLdap.php#L749 vulncheck.com: https://www.vulncheck.com/advisories/mrbs-before-1.13.0-ldap-injection-via-authldap-php-authentication-filter

Credits

leediay153 from Viettel Post John Beranek