PYSEC-2026-661

    Dashboard / Vulnerabilities / PYSEC-2026-661

    PYSEC-2026-661

    Published: 2 Jul 2026Last Modified: 6 Jul 2026

    Summary: Moderate severity vulnerability that affects mailman

    Details: An issue was discovered in GNU Mailman before 2.1.28. A crafted URL can cause arbitrary text to be displayed on a web page from a trusted site.

    References: https://nvd.nist.gov/vuln/detail/CVE-2018-13796, https://bugs.launchpad.net/mailman/+bug/1780874, https://github.com/advisories/GHSA-xqvg-xm9m-p2c4, https://lists.debian.org/debian-lts-announce/2018/07/msg00034.html, https://security.gentoo.org/glsa/201904-10, https://usn.ubuntu.com/4348-1, https://www.mail-archive.com/[email protected]/msg71003.html, https://pypi.org/project/mailman

    Affected packages

    Package

    Name: mailman

    Purl: pkg:pypi/mailman

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.1.28

    Affected versions

    3.0.0b3-

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High