CVE-2021-44227

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.

Published: 2021-12-02 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-44227 is rated Moderate Risk (52.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.73%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-44227

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.34% 0.73% +0.39%
2 2026-03-04 0.17% 0.34% +0.17%
3 2026-03-01 — 0.17% —

Full EPSS history (45 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-44227

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2021-44227

GitHub Security Advisory for CVE-2021-44227

GHSA-xq58-69h2-765m · Severity: high · Ecosystem: pip — Cross Site Request Forgery in mailman

OS Trackers for CVE-2021-44227

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2021-44227
suse high CVE-2021-44227 severity important: SUSE including 4 source package names (mailman-2.1.15-30.el7_9.2, mailman-2.1.15-9.6.29.1, mailman-2.1.17-3.26.1, mailman-2.1.29-12.module+el8.5.0+13466+327eb9f3.2), 20 product×package rows across 20 product lines (HPE Helion OpenStack 8, SUSE Liberty Linux 7, … (20 product lines)): Fixed 20. https://www.suse.com/security/cve/CVE-2021-44227/
ubuntu medium CVE-2021-44227 medium priority: Ubuntu including 1 source packages (mailman), 5 status rows across 5 suites (bionic, focal, trusty, upstream, xenial): released 4, ignored 1. https://ubuntu.com/security/CVE-2021-44227

Affected software / configurations for CVE-2021-44227

Vendor Product Version Raw CPE
gnu mailman < 2.1.38 cpe:2.3:a:gnu:mailman:*:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2021-44227

URL Tags
https://bugs.launchpad.net/mailman/+bug/1952384 Issue Tracking Mailing List Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/06/msg00011.html Mailing List Third Party Advisory
cvelogic Threat Intelligence