RCE in Mjdm Majordomo
CVE-2026-27174
MajorDoMo (aka Major Domestic Module) allows unauthenticated remote code execution via the admin panel's PHP console feature. An include order bug in modules/panel.class.php causes execution to continue past a redirect() call that lacks an exit statement, allowing unauthenticated requests to reach the ajax handler in inc_panel_ajax.php. The console handler within that file passes user-supplied input from GET parameters (via register_globals) directly to eval() without any authentication check. An attacker can execute arbitrary PHP code by sending a crafted GET request to /admin.php with ajax_panel, op, and command parameters.
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.070 (93.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Mjdm Majordomo
- Sergejey Majordomo — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- disclosure@vulncheck.com (Exploit, Third Party Advisory, third-party-advisory)
- disclosure@vulncheck.com (issue-tracking, Exploit, patch, Issue Tracking)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-27174?
- CVE-2026-27174 is a critical-severity vulnerability in Mjdm Majordomo, classified under Code Injection. CVSS score: 9.8/10. Published 2026-02-18.
- How severe is CVE-2026-27174?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-27174 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.