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TI-2021-18605 Aliases CVE-2021-42096GHSA-c875-cgwj-4fjw

GNU Mailman before 2.1.35 may allow remote Privilege Escalation.

Priority LOW 23CWE-307Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-307.

Summary

GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A certain csrf_token value is derived from the admin password, and may be useful in conducting a brute-force attack against that password.

Why it matters now

EPSS 0.0125 69th percentileScored 2026-11-07
Fix Fixed Red Hat: 4 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:gnu:mailman:*:*:*:*:*:*:*:*before 2.1.35VulnerableGNU
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:gnu:mailman:*:*:*:*:*:*:*:* Versions before 2.1.35 Vulnerable ·GNU
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

Red Hat 4 advisories

  • RHSA-2021:4839 Released 2021-11-24 · Red Hat rating Important
    mailman:2.1 security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) mailman-3:2.1.29-11.module+el8.4.0+13212+81332387.1.aarch64::mailman:2.1, mailman-3:2.1.29-11.module+el8.4.0+13212+81332387.1.ppc64le::mailman:2.1, mailman-3:2.1.29-11.module+el8.4.0+13212+81332387.1.s390x::mailman:2.1 +2
  • RHSA-2021:4837 Released 2021-11-24 · Red Hat rating Important
    mailman:2.1 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) mailman-3:2.1.29-4.module+el8.2.0+13241+705a6aa4.3.aarch64::mailman:2.1, mailman-3:2.1.29-4.module+el8.2.0+13241+705a6aa4.3.ppc64le::mailman:2.1, mailman-3:2.1.29-4.module+el8.2.0+13241+705a6aa4.3.s390x::mailman:2.1 +2
  • RHSA-2021:4838 Released 2021-11-24 · Red Hat rating Important
    mailman:2.1 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) mailman-3:2.1.29-4.module+el8.1.0+13242+45286865.1.aarch64::mailman:2.1, mailman-3:2.1.29-4.module+el8.1.0+13242+45286865.1.ppc64le::mailman:2.1, mailman-3:2.1.29-4.module+el8.1.0+13242+45286865.1.s390x::mailman:2.1 +2
Show 1 more Red Hat advisories
  • RHSA-2021:4826 Released 2021-11-23 · Red Hat rating Important
    mailman:2.1 security update
    • Red Hat Enterprise Linux AppStream (v. 8) mailman-3:2.1.29-12.module+el8.5.0+13211+e8845b76.1.aarch64::mailman:2.1, mailman-3:2.1.29-12.module+el8.5.0+13211+e8845b76.1.ppc64le::mailman:2.1, mailman-3:2.1.29-12.module+el8.5.0+13211+e8845b76.1.s390x::mailman:2.1 +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:4826
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2021:4838
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2021:4837
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2021:4839
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42096
  2. 2026-10-03 Alias added: GHSA-c875-cgwj-4fjw

References

Patch 2

Advisory 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences