Description
Cross-site scripting vulnerability in Mailman 2.1.26 and earlier allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GNU Mailman | Mailman | 2.1.26 and earlier | — |
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 9 | mailman | 1:2.1.23-1+deb9u3 | DSA-4246-1 |
| Debian 8 | mailman | 1:2.1.18-2+deb8u3 | DLA-1442-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | mailman | 1:2.1.26-1ubuntu0.1 | USN-4348-1 |
| Ubuntu 16.04 LTS | mailman | 1:2.1.20-1ubuntu0.4 | USN-4348-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | mailman | 3:2.1.15-30.el7 | RHSA-2020:1054 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES 12 SP3 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES 12 SP2 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES 12 SP1 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES 12 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | mailman | 2.1.15-9.6.6.1 | SUSE-SU-2019:13924-1 |
| SLES 11 SP3 | mailman | 2.1.15-9.6.6.1 | SUSE-SU-2019:13924-1 |
| SLES for SAP 12 SP4 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES for SAP 12 SP3 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES for SAP 12 SP2 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES for SAP 12 SP1 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SLES for SAP 11 SP4 | mailman | 2.1.15-9.6.6.1 | SUSE-SU-2019:13924-1 |
| SUSE OpenStack Cloud 7 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mailman | 2.1.15-9.6.6.1 | SUSE-SU-2019:13924-1 |
| SUSE Enterprise Storage 4 | mailman | 2.1.17-3.3.3 | SUSE-SU-2018:4296-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | mailman | 3:2.1.15-30.amzn2 | ALAS2-2020-1536 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | mailman | 3:2.1.15-30.el7 | ELSA-2020-1054 |
Advisories 8
- RHSA-2020:1054 Red Hat Security Advisory: mailman security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-4246-1 mailman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1442-1 mailman - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4348-1 mailman vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:13924-1 Security update for mailman SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4296-1 Security update for mailman SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2020-1536 Moderate: mailman security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 22, 2020
- ELSA-2020-1054 Moderate: mailman security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 6, 2020
References
- [mailman-announce] 20180622 Mailman 2.1.27 released mailing-list
- DSA-4246 vendor-advisory
- [debian-lts-announce] 20180724 [SECURITY] [DLA 1442-1] mailman security update mailing-list
- JVN#00846677 third-party-advisory
- GLSA-201904-10 vendor-advisory
- USN-4348-1 vendor-advisory