Directory Traversal Vulnerability in GNU Mailman Bundled with cPanel
CVE-2025-43919

7.5HIGH

Key Information:

Vendor

Gnu
Status
Mailman
Vendor
CVE Published:
20 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-43919?

The vulnerability within GNU Mailman 2.1.39, as deployed in cPanel, permits unauthorized users to exploit a directory traversal flaw. By manipulating the username parameter at the private archive endpoint, attackers may access arbitrary files on the server, leading to potential exposure of sensitive information. This issue highlights the necessity for secure coding practices and timely updates to avoid unauthorized data access.

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Affected Version(s)

Mailman 2.1.39

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-43919
Created by 0NYX-MY7H

References

https://code.launchpad.net/~mailman-coders/mailman/2.1
https://github.com/0NYX-MY7H/CVE-2025-43919
https://github.com/cpanel/mailman2-python3

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

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