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Vulnerability record · CVE-2021-42097 · published 21 October 2021

CVE-2021-42097: Gnu mailman cross-site request forgery vulnerability

Gnu · Mailman

GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover).

8.0 CVSS 3.1 High EPSS 1.3% · top 30.0% CWE-352 · Cross-site request forgery
8.0CVSS 3.1 base score, v2 8.5
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover).

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/10/21/4 Mailing ListPatchThird Party Advisory
https://bugs.launchpad.net/mailman/+bug/1947640 PatchThird Party Advisory
https://mail.python.org/archives/list/mailman-announce%40python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
https://www.debian.org/security/2021/dsa-4991 Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/21/4 Mailing ListPatchThird Party Advisory
https://bugs.launchpad.net/mailman/+bug/1947640 PatchThird Party Advisory
https://mail.python.org/archives/list/mailman-announce%40python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
https://www.debian.org/security/2021/dsa-4991 Third Party Advisory

Track CVE-2021-42097 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2021-42097), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.