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CVE details

CVE-2025-43921

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to create lists via the /mailman/create endpoint. NOTE: multiple third parties report that they are unable to reproduce this, regardless of whether cPanel or WHM is used.

Score
5.3 medium
Published
2025-04-20
Links
NVD · cve.org

Affected ports (3)

PortPackageVersionStatusMaintainer
mail/mailmanmailman2.1.39_4unaddressedmandree@FreeBSD.org
mail/mailman-exim4mailman-exim42.1.39_4unaddressedmandree@FreeBSD.org
mail/mailman-postfixmailman-postfix2.1.39_4unaddressedmandree@FreeBSD.org

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>mailman</name>
	<range><lt>FIXME</lt></range>
      </package>
      <package>
	<name>mailman-exim4</name>
	<range><lt>FIXME</lt></range>
      </package>
      <package>
	<name>mailman-postfix</name>
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows
	unauthenticated attackers to create lists via the /mailman/create
	endpoint. NOTE: multiple third parties report that they are unable to
	reproduce this, regardless of whether cPanel or WHM is used.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2025-43921</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2025-43921</url>
    </references>
    <dates>
      <discovery>2025-04-20</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>