5

CVE-2025-54458: mattermost confluence Missing Authorization

CVSS: 5.0v3.1MediumAnalyzed
AliasesGHSA-j66h-xhpr-7q5gGO-2025-3867
Published 11-08-2025Last modified 11-08-2025
Open JSON

Vulnerability summary

CVE-2025-54458 is a medium (CVSS 5.0) Missing Authorization vulnerability in mattermost confluence. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.9% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.21%
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 2 · Related 2
OPENSUSE-SU-2025:15469-1OPENSUSE-SU-2026:21483-1

Timeline

  1. 11-08-2025
    PublishedVulnerability first disclosed.
  2. 11-08-2025
    Last modifiedVulnerability information updated.

Description

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to create a subscription for a Confluence space the user does not have access to via the create subscription endpoint.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.21%

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

Mattermost2 products
Github.com/mattermost1 product
  • mattermost-plugin-confluence< 1.5.0

2 vendors · 3 products

References

4 links