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Fencer Intel
high 8.8

CVE-2021-44227 json

Cross Site Request Forgery in mailman

published 4y ago modified 4mo ago also GHSA-xq58-69h2-765m , PYSEC-2026-660 , EUVD-2021-2613

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

In GNU Mailman before 2.1.38, a list member or moderator can get a CSRF token and craft an admin request (using that token) to set a new admin password or make other changes.

Patch / fix

  • pypi mailman 2.1.38
  • gnu mailman 2.1.38
  • mailman Ubuntu 18.04 LTS 1:2.1.26-1ubuntu0.6
  • mailman Ubuntu Pro 16.04 LTS 1:2.1.20-1ubuntu0.6+esm3
  • mailman Ubuntu Pro 20.04 LTS 1:2.1.29-1ubuntu3.1+esm2

ubuntu advisories UBUNTU-CVE-2021-44227

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mailman RHEL 8 3:2.1.29-12.module+el8.5.0+13466+327eb9f3.2
  • mailman RHEL 7 3:2.1.15-30.el7_9.2
  • mailman RHEL 8.1 E4S 3:2.1.29-5.module+el8.1.0+13542+e9b93c88
  • mailman RHEL 8.2 EUS 3:2.1.29-6.module+el8.2.0+13543+86b2c701
  • mailman RHEL 8.4 EUS 3:2.1.29-11.module+el8.4.0+13467+746daedf.2

red hat advisories RHSA-2021:5081RHSA-2021:5080RHSA-2021:4916RHSA-2021:4915RHSA-2021:4913

  • mailman SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +10 more 2.1.17-3.26.1

suse advisories SUSE-SU-2022:1886-1

  • mailman AlmaLinux 8 3:2.1.29-12.module_el8.5.0+26+48d4c9ee.2
  • mailman AlmaLinux 8 3:2.1.29-12.module_el8.5.0+2602+327eb9f3.2

almalinux advisories ALSA-2021:4916

  • mailman Rocky Linux 8 3:2.1.29-12.module+el8.5.0+717+27fd1ba7.2
  • mailman Rocky Linux 8 3:2.1.29-12.module+el8.5.0+703+19300c10

rocky linux advisories RLSA-2021:4916

Is CVE-2021-44227 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-44227 updated cvss 8.0

mailman: CSRF token bypass allows to perform CSRF attacks and admin takeover

  • Red Hat Enterprise Linux 6 mailman
    affected: workaround, no fix planned “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Enterprise Linux AppStream (v. 8) mailman 2.1.29-12.module+el8.5.0+13466+327eb9f3.2
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2021:4916
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) mailman 2.1.29-5.module+el8.1.0+13542+e9b93c88
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2021:5081
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) mailman 2.1.29-6.module+el8.2.0+13543+86b2c701
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2021:5080
  • Red Hat Enterprise Linux AppStream EUS (v.8.4) mailman 2.1.29-11.module+el8.4.0+13467+746daedf.2
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2021:4915
  • Red Hat Enterprise Linux Server (v. 7) mailman 2.1.15-30.el7_9.2 Red Hat Enterprise Linux Workstation (v. 7) mailman 2.1.15-30.el7_9.2
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2021:4913

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi mailman
<2.1.38
2.1.38

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.