8.5

CVE-2025-5689: canonical authd Improper Privilege Management

CVSS: 8.5v3.1HighAnalyzed
AliasesGHSA-g8qw-mgjx-rwjrGO-2025-3762
Published 16-06-2025Last modified 17-06-2025
Open JSON

Vulnerability summary

CVE-2025-5689 is a high (CVSS 8.5) Improper Privilege Management vulnerability in canonical authd. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.4% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2025:15405-1

Timeline

  1. 16-06-2025
    PublishedVulnerability first disclosed.
  2. 17-06-2025
    Last modifiedVulnerability information updated.

Description

A flaw was found in the temporary user record that authd uses in the pre-auth NSS. As a result, a user login for the first time will be considered to be part of the root group in the context of that SSH session.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

0.00 pp

From 0.30% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.30%

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

Canonical1 product
  • authd≥ 0.0.0, ≤ 0.5.4 | < 0.5.4
Github.com/ubuntu1 product
  • authd< 0.5.4

2 vendors · 2 products

References

4 links