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CVE-2021-44227

28
FAUCET Score

CVE-2021-44227 is a Cross-Site Request Forgery (CSRF) vulnerability affecting GNU Mailman versions prior to 2.1.38, allowing a malicious list member or moderator to craft administrative requests. This high-severity vulnerability (CVSS 8.8) has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability, including resetting an admin password. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.38CPE matchmatch criteria
cpe:2.3:a:gnu:mailman:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.69%
Probability of exploitation in next 30 days
EPSS Percentile
49.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0069 is in the 51st percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

pippatch availablevia ghsa
Product: mailmanFixed in: 2.1.38
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: mailman:2.1-8040020211129072238.70584597
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: mailman:2.1-8010020211206073347.656b880e
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: mailman:2.1-8020020211206073633.c3a0935b
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: mailman-3:2.1.15-30.el7_9.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: mailman:2.1-8050020211129071856.aa3ced04
View patch
ubuntupatch availablevia ubuntu_usn
Product: mailman (xenial)Fixed in: 1:2.1.20-1ubuntu0.6+esm3
ubuntupatch availablevia ubuntu_usn
Product: mailman (focal)Fixed in: 1:2.1.29-1ubuntu3.1+esm2

Vendor Advisories (3)

ubuntuUSN-8067-1

Mailman vulnerability

Mar 2, 2026
pipGHSA-xq58-69h2-765mhigh

Cross Site Request Forgery in mailman

Dec 16, 2021
redhatCVE-2021-44227Important

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

Nov 26, 2021

References

bugs.launchpad.net / mailman/+bug/1952384
Issue TrackingMailing ListPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2022/06/msg00011.html
Mailing ListThird Party Advisory