MajorDoMo Unauthenticated Remote Code Execution via Admin Console Eval

published 2026-02-18 8 mo ago modified 2026-11-08 24 h ago also EUVD-2026-7929

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 6.9%; EPSS 6.9% chance of exploitation in 30 days, percentile 94%
public exploits: 1; Metasploit, plus a Nuclei check

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.

Patch / fix

links 1

github.com/sergejey/majordomo#1177 pull request

Timeline

2026-02-18 First public exploit (Metasploit exploit/multi/http/majordomo_console_eval_rce)
2026-02-18 Published

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 8 mo ago (2026-02-25)

Exploit prediction

6.85% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit exploit/multi/http/majordomo_console_eval_rce MajorDoMo Console Eval Unauthenticated RCE metasploit exploit, excellent rank, 2026-02-18
Nuclei template MajorDoMo - Unauthenticated RCE nuclei detection template
github.com https://github.com/sergejey/majordomo/pull/1177 referenced PoC, tagged "exploit" by a source, unverified
chocapikk.com https://chocapikk.com/posts/2026/majordomo-revisited/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

sergejey MajorDoMo

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

github.com /sergejey/majordomo/pull/1177
issue-tracking, patch, exploit
chocapikk.com /posts/2026/majordomo-revisited/
third-party-advisory, exploit
vulncheck.com /advisories/majordomo-unauthenticated-remote-code-execution-via-admin-console-eval
third-party-advisory

Sources

CVE List CVE-2026-27174
NVD CVE-2026-27174

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary