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TI-2026-21623 Aliases CVE-2026-27181GHSA-5v24-5hr7-xg26

MajorDoMo Unauthenticated Module Uninstall via Market Endpoint

Priority HIGH 77CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

MajorDoMo (aka Major Domestic Module) allows unauthenticated arbitrary module uninstallation through the market module. The market module's admin() method reads gr('mode') from $_REQUEST and assigns it to $this->mode at the start of execution, making all mode-gated code paths reachable without authentication via the /objects/?module=market endpoint. The uninstall mode handler calls uninstallPlugin(), which deletes module records from the database, executes the module's uninstall() method via eval(), recursively deletes the module's directory and template files using removeTree(), and removes associated cycle scripts. An attacker can iterate through module names and wipe the entire MajorDoMo installation with a series of unauthenticated GET requests.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00797 56th 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
Poc
Automatable
Yes
Technical impact
Partial

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-2026-27181
  2. 2026-10-03 Alias added: GHSA-5v24-5hr7-xg26

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-2023-27813 MajorDoMo (aka Major Domestic Module) before 0662e5e allows command execution via… CVSS 3.1CRITICAL 9.8
  • TI-2026-21622 MajorDoMo Supply Chain Remote Code Execution via Update URL Poisoning CVSS 4.0CRITICAL 9.3
  • 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