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Status published
High
CVE-2021-43999
Improper validation of SAML responses
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- We would like to thank Finn Steglich (ETAS) for reporting this issue.
References
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Affected Vendor
Apache Software Foundation
View all reports →Affected Software
Apache Guacamole
Vulnerable Versions:
1.3.0, 1.2.0
Timeline
Official Publish:
January 11th, 2022
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H