Skip to content
Fencer Vulns
medium 6.5

CVE-2020-12108 json

/options/mailman in GNU Mailman before 2.1.31 allows Arbitrary Content Injection.

published 2020-05-06 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4424

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

/options/mailman in GNU Mailman before 2.1.31 allows Arbitrary Content Injection.

Patch / fix

  • gnu mailman 2.1.31
  • mailman Ubuntu 16.04 LTS 1:2.1.20-1ubuntu0.5
  • mailman Ubuntu 18.04 LTS 1:2.1.26-1ubuntu0.2
  • mailman Ubuntu 20.04 LTS 1:2.1.29-1ubuntu3.1

ubuntu advisories UBUNTU-CVE-2020-12108

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mailman RHEL 8 3:2.1.29-11.module+el8.4.0+8277+5e2c6e6e

red hat advisories RHSA-2021:1751

  • mailman SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +14 more 2.1.17-3.20.1

suse advisories SUSE-SU-2020:1301-1

  • mailman Package Hub 15 SP2 2.1.34-bp152.7.3.1
  • mailman openSUSE Leap 15.2 2.1.34-lp152.7.3.1
  • mailman Package Hub 15 SP1 2.1.29-bp151.5.9.1
  • mailman openSUSE Leap 15.1 2.1.29-lp151.3.11.1

opensuse advisories openSUSE-SU-2020:1752-1openSUSE-SU-2020:1707-1openSUSE-SU-2020:0764-1openSUSE-SU-2020:0661-1

  • mailman Rocky Linux 8 3:2.1.29-11.module+el8.4.0+539+54f8785b

rocky linux advisories RLSA-2021:1751

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-12108 updated cvss 5.5

mailman: arbitrary content injection via the options login page

  • Red Hat Enterprise Linux 5 mailman Red Hat Enterprise Linux 6 mailman
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 mailman
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) mailman 2.1.29-11.module+el8.4.0+8277+5e2c6e6e
    fixed: vendor fix RHSA-2021:1751

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.70% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.launchpad.net https://bugs.launchpad.net/mailman/+bug/1873722 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.