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).
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 10 | mailman | 1:2.1.29-1+deb10u2 | DSA-4991-1 |
| Debian 9 | mailman | 1:2.1.23-1+deb9u7 | DLA-2791-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mailman | 1:2.1.29-1ubuntu3.1 | USN-5121-2 |
| Ubuntu 18.04 LTS | mailman | 1:2.1.26-1ubuntu0.4 | USN-5121-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | mailman | 1:2.1.20-1ubuntu0.6+esm1 | USN-5121-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | mailman | 3:2.1.29-12.module+el8.5.0+13211+e8845b76.1 | RHSA-2021:4826 |
| RHEL 7 | mailman | 3:2.1.15-30.el7_9.2 | RHSA-2021:4913 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | mailman | 3:2.1.29-11.module+el8.4.0+13212+81332387.1 | RHSA-2021:4839 |
| RHEL 8.2 EUS | mailman | 3:2.1.29-4.module+el8.2.0+13241+705a6aa4.3 | RHSA-2021:4837 |
| RHEL 8.1 EUS | mailman | 3:2.1.29-4.module+el8.1.0+13242+45286865.1 | RHSA-2021:4838 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | mailman | 3:2.1.29-12.module_el8.5.0+26+48d4c9ee.2 | ALSA-2021:4826 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | mailman | 3:2.1.29-12.module+el8.5.0+703+19300c10 | RLSA-2021:4826 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP2 | mailman | 2.1.35-bp152.7.6.1 | openSUSE-SU-2021:1452-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | mailman | 2.1.35-lp152.7.6.1 | openSUSE-SU-2021:1436-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | mailman | 3:2.1.15-30.amzn2.2 | ALAS2-2022-1740 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | mailman | 3:2.1.29-12.module+el8.5.0+20429+dde04a6e.1 | ELSA-2021-4826 |
| Oracle Linux 7 | mailman | 3:2.1.15-30.el7_9.2 | ELSA-2021-4913 |
Advisories 16
- ALSA-2021:4826 Important: mailman:2.1 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:4839 Red Hat Security Advisory: mailman:2.1 security update Red Hat Security Advisories (RHSA) · Sep 8, 2026
- RHSA-2021:4913 Red Hat Security Advisory: mailman security update Red Hat Security Advisories (RHSA) · Sep 8, 2026
- RHSA-2021:4838 Red Hat Security Advisory: mailman:2.1 security update Red Hat Security Advisories (RHSA) · Sep 8, 2026
- RHSA-2021:4837 Red Hat Security Advisory: mailman:2.1 security update Red Hat Security Advisories (RHSA) · Sep 8, 2026
- RHSA-2021:4826 Red Hat Security Advisory: mailman:2.1 security update Red Hat Security Advisories (RHSA) · Sep 8, 2026
- USN-5121-1 mailman vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4991-1 mailman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2791-1 mailman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-5121-2 mailman vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- RLSA-2021:4826 Important: mailman:2.1 security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2021:1452-1 Security update for mailman SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1436-1 Security update for mailman SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2022-1740 Important: mailman security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 20, 2022
- ELSA-2021-4913 Important: mailman security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 3, 2021
- ELSA-2021-4826 Important: mailman:2.1 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 24, 2021