CVE-2021-42096 Weak cryptography in n/a

What is CVE-2021-42096?

CVE-2021-42096 is a medium-severity vulnerability in Debian Debian Linux, published on 21 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-307

Which versions are affected by CVE-2021-42096?

It affects 2 products.

Products include Debian Debian Linux, Gnu Mailman.

How do I fix CVE-2021-42096?

Upgrade to a fixed version.

Is CVE-2021-42096 being exploited?

There is no known exploitation of CVE-2021-42096 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c875-cgwj-4fjw, UBUNTU-CVE-2021-42096.