What is CVE-2021-43999?

CVE-2021-43999 is a high-severity vulnerability in Apache Guacamole, classified under Improper Authentication. CVSS score: 8.8/10. Published 2022-01-11.

How severe is CVE-2021-43999?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Apache Guacamole

CVE-2021-43999

Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.

Vulnerability class: Broken Authentication

EPSS: 0.018 (76.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Guacamole — versions 1.2.0, 1.3.0
Apache Software Foundation Guacamole — versions 1.3.0, 1.2.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43999?: CVE-2021-43999 is a high-severity vulnerability in Apache Guacamole, classified under Improper Authentication. CVSS score: 8.8/10. Published 2022-01-11.
How severe is CVE-2021-43999?: High severity. CVSS v3 base score is 8.8 out of 10.