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TI-2026-21622 Aliases CVE-2026-27180GHSA-grp8-p6j9-9x5f

MajorDoMo Supply Chain Remote Code Execution via Update URL Poisoning

Priority MEDIUM 50CWE-494Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-494.

Summary

MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated remote code execution through supply chain compromise via update URL poisoning. The saverestore module exposes its admin() method through the /objects/?module=saverestore endpoint without authentication because it uses gr('mode') (which reads directly from $_REQUEST) instead of the framework's $this->mode. An attacker can poison the system update URL via the auto_update_settings mode handler, then trigger the force_update handler to initiate the update chain. The autoUpdateSystem() method fetches an Atom feed from the attacker-controlled URL with trivial validation, downloads a tarball via curl with TLS verification disabled (CURLOPT_SSL_VERIFYPEER set to FALSE), extracts it using exec('tar xzvf ...'), and copies all extracted files to the document root using copyTree(). This allows an attacker to deploy arbitrary PHP files, including webshells, to the webroot with two GET requests.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01198 68th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
sergejeyMajorDoMoall versions—No fix listedCNA
  • MajorDoMo Vendorsergejey Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mjdm:majordomo:-:*:*:*:*:*:*:*not specified by NVDVulnerablesergejey
  • cpe:2.3:a:mjdm:majordomo:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·sergejey

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27180
  2. 2026-10-03 Alias added: GHSA-grp8-p6j9-9x5f

References

Exploit 2

  • TI-2026-21617 MajorDoMo Command Injection in rc/index.php via Race Condition CVSS 4.0CRITICAL 9.2
  • TI-2026-21616 MajorDoMo Unauthenticated Remote Code Execution via Admin Console Eval CVSS 4.0CRITICAL 9.3
  • TI-2026-21623 MajorDoMo Unauthenticated Module Uninstall via Market Endpoint CVSS 4.0HIGH 8.7
  • TI-2023-27813 MajorDoMo (aka Major Domestic Module) before 0662e5e allows command execution via… CVSS 3.1CRITICAL 9.8
  • TI-2026-21621 MajorDoMo Unauthenticated SQL Injection in Commands Module CVSS 4.0HIGH 8.8
  • TI-2026-21620 MajorDoMo Stored Cross-Site Scripting via Method Parameters to Shoutbox CVSS 4.0MEDIUM 5.3
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences