8.8

CVE-2021-43999: apache software foundation apache guacamole Improper Authentication

CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2021-43999
Published 11-01-2022Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-43999 is a high (CVSS 8.8) Improper Authentication vulnerability in apache software foundation apache guacamole. EPSS estimates a 1.78% chance of exploitation in the next 30 days, higher than 78% of scored vulnerabilities.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
1.78%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-01-2022
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.78%

Chance of exploitation in the next 30 days

Percentile

78%

Versus all other CVEs

30-day change

0.00 pp

From 1.78% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.78%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
Apache software foundation1 product
Ubuntu1 product
  • guacamole-serverAll versions (No fix recorded)

3 vendors · 3 products

References

4 links