Description
GNU Mailman before 2.1.33 allows arbitrary content injection via the Cgi/private.py private archive login page.
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+deb9u6 | DLA-2276-1 |
| Debian 8 | mailman | 1:2.1.18-2+deb8u7 | DLA-2265-1 |
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 | 1:2.1.26-1ubuntu0.3 | USN-4406-1 |
| Ubuntu 16.04 LTS | mailman | 1:2.1.20-1ubuntu0.6 | USN-4406-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | mailman | 3:2.1.29-11.module+el8.4.0+8277+5e2c6e6e | RHSA-2021:1751 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | mailman | 3:2.1.29-11.module+el8.4.0+539+54f8785b | RLSA-2021:1751 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SLES 12 SP4 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SLES 12 SP3 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SLES 12 SP2 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SLES 11 SP4 | mailman | 2.1.15-9.6.26.1 | SUSE-SU-2020:14423-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SLES for SAP 12 SP4 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SLES for SAP 12 SP3 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SLES for SAP 12 SP2 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SUSE Package Hub 15 SP2 | mailman | 2.1.34-bp152.7.3.1 | openSUSE-SU-2020:1752-1 |
| SUSE OpenStack Cloud Crowbar 9 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SUSE OpenStack Cloud Crowbar 8 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SUSE OpenStack Cloud 9 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SUSE OpenStack Cloud 8 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SUSE OpenStack Cloud 7 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mailman | 2.1.15-9.6.26.1 | SUSE-SU-2020:14423-1 |
| SUSE HPE Helion OpenStack 8 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
| SUSE Enterprise Storage 5 | mailman | 2.1.17-3.23.1 | SUSE-SU-2020:2048-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | mailman | 2.1.34-lp152.7.3.1 | openSUSE-SU-2020:1707-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | mailman | 3:2.1.29-11.module+el8.4.0+20063+5e2c6e6e | ELSA-2021-1751 |
Advisories 12
- DSA-4991-1 mailman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2265-1 mailman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2276-1 mailman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-5121-2 mailman vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-4406-1 mailman vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- RLSA-2021:1751 Moderate: mailman:2.1 security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2020:14423-1 Security update for mailman SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1707-1 Recommended update for mailman SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2048-1 Security update for mailman SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2021:1751 Red Hat Security Advisory: mailman:2.1 security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- openSUSE-SU-2020:1752-1 Recommended update for mailman SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2021-1751 Moderate: mailman:2.1 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- https://bugs.launchpad.net/mailman/+bug/1877379
- [debian-lts-announce] 20200630 [SECURITY] [DLA 2265-1] mailman security update mailing-list
- USN-4406-1 vendor-advisory
- [debian-lts-announce] 20200710 [SECURITY] [DLA 2276-1] mailman security update mailing-list
- openSUSE-SU-2020:1707 vendor-advisory
- openSUSE-SU-2020:1752 vendor-advisory
- DSA-4991 vendor-advisory