CVE-2021-33054 Auth bypass in n/a

What is CVE-2021-33054?

CVE-2021-33054 is a high-severity authentication bypass vulnerability in Debian Debian Linux, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Weakness: CWE-347

Which versions are affected by CVE-2021-33054?

It affects 2 products.

Products include Debian Debian Linux, Inverse Sogo.

How do I fix CVE-2021-33054?

Upgrade to a fixed version.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-33054 being exploited?

There is no known exploitation of CVE-2021-33054 in the wild and no public exploit code.

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• 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 DEBIAN-CVE-2021-33054, DLA-2707-1, DSA-5029-1, GHSA-5x58-gqg4-wfvq, MGASA-2022-0481, UBUNTU-CVE-2021-33054.