What is the CVSS score of CVE-2026-27181?

CVE-2026-27181 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2026-27181?

Yes, a public proof-of-concept exploit is available for CVE-2026-27181. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-27181?

Within 24 hours: Inventory all MajorDoMo deployments and assess exposure (internet-facing vs. internal-only). Within 7 days: Implement network access controls to restrict market module endpoints and disable the market module if not operationally required. Within 30 days: Monitor vendor communications for patch availability and establish upgrade testing procedures; consider alternative solutions if patches remain unavailable.

Majordomo CVE-2026-27181

HIGH

Missing Authorization (CWE-862)

2026-02-18 disclosure@vulncheck.com

Authentication Bypass Majordomo Mjdm

7.5

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Access market module endpoint
Exploit

Set mode parameter to uninstall
Execution

Invoke uninstallPlugin function
Impact

Delete module records and directories

Vulnerability Assessment

Weakness	CWE CWE-862 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization checks on every request MITRE ATT&CK 1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	MajorDoMo with market module enabled accessible at /objects/?module=market endpoint without authentication. No login credentials required; attack exploits missing authentication checks in market module's admin() method.
Impact	CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitation no authentication required. Public exploit/POC available.
Exploit ScenarioDerived	An attacker without authentication could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Unauthenticated module deletion in Majordomo's market module allows remote attackers to completely disable installations through a series of GET requests. The vulnerability stems from improper authentication checks that expose the uninstall functionality without requiring credentials, enabling attackers to iteratively remove all modules and associated files. Public exploit code exists for this high-severity flaw, and no patch is currently available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 7.5

MajorDoMo (aka Major Domestic Module) allows unauthenticated arbitrary module uninstallation through the market module. [CVSS 7.5 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-862 (Missing Authorization). Affects the market component of Majordomo. 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 eva

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

PoC Detected

Feb 20, 2026 - 19:51 vuln.today

Public exploit code

CVE Published

Feb 18, 2026 - 22:16 nvd

HIGH 7.5

DescriptionCVE.org

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.

Articles & Coverage 1

vulnerability.circl.lu MajorDoMo Multiple Critical RCE Vulnerabilities (CVE-2026-27174 to CVE-2026-27181) Feb 19, 2026

Executive ViewAI

Why It Matters

MajorDoMo installations are vulnerable to unauthorized module removal by unauthenticated attackers, potentially disabling critical functionality and causing service disruption. This vulnerability poses an immediate risk to any organization running affected versions, as exploitation requires no authentication and public exploit code exists.

Business Impact: High

Compensating Controls

Disable or restrict access to the market module at the network level (WAF rules, firewall ACLs); segment MajorDoMo systems from untrusted networks; implement API gateway authentication in front of the application; monitor for suspicious module removal attempts in application logs; restrict administrative functions to authenticated, authorized users only through network segmentation.

Threat Intelligence Overview

EPSS Score

0.0%

Top 90% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.