// For flags

CVE-2021-43999

Improper validation of SAML responses

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Apache Guacamole versiones 1.2.0 y 1.3.0, no comprueban correctamente las respuestas recibidas de un proveedor de identidad SAML. Si la compatibilidad con SAML está habilitada, esto puede permitir que un usuario malicioso asuma la identidad de otro usuario de Guacamole

*Credits: We would like to thank Finn Steglich (ETAS) for reporting this issue.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-11-18 CVE Reserved
  • 2022-01-11 CVE Published
  • 2024-01-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-287: Improper Authentication
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
 Guacamole
Search vendor "Apache" for product "Guacamole"
 1.2.0
Search vendor "Apache" for product "Guacamole" and version "1.2.0"
-
Affected
Apache
Search vendor "Apache"
 Guacamole
Search vendor "Apache" for product "Guacamole"
 1.3.0
Search vendor "Apache" for product "Guacamole" and version "1.3.0"
-
Affected