What’s Vulnerable › Vulnerabilities

CVE-2018-5950

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-01-23 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross-site scripting (XSS) vulnerability in the web UI in Mailman before 2.1.26 allows remote attackers to inject arbitrary web script or HTML via a user-options URL.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Debian Linux: 7.0, 8.0, 9.0
• GNU Mailman: before 2.1.26 — fixed in 2.1.26
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.4, 7.6
• RedHat Enterprise Linux Server Eus: 7.4, 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.4, 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: GNU Mailman 2.1.26. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/159761/Mailman-2.1.23-Cross-Site-Scripting.html
• http://www.securityfocus.com/bid/104594
• https://access.redhat.com/errata/RHSA-2018:0504
• https://access.redhat.com/errata/RHSA-2018:0505
• https://bugs.launchpad.net/mailman/+bug/1747209
• https://lists.debian.org/debian-lts-announce/2018/02/msg00007.html
• https://usn.ubuntu.com/3563-1/
• https://www.debian.org/security/2018/dsa-4108
• https://www.mail-archive.com/mailman-users%40python.org/msg70375.html
• http://packetstormsecurity.com/files/159761/Mailman-2.1.23-Cross-Site-Scripting.html
• http://www.securityfocus.com/bid/104594
• https://access.redhat.com/errata/RHSA-2018:0504

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