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CVE-2025-9079: mattermost Path Traversal

CVSS: 8.0v3.1HighAnalyzed
AliasesGHSA-qx3f-6vq3-8j8mGO-2025-3977
Published 19-09-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-9079 is a high (CVSS 8.0) Path Traversal vulnerability in mattermost. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.7% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.64%
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 3 · Related 3
OPENSUSE-SU-2025:15576-1OPENSUSE-SU-2026:21483-1SUSE-SU-2025:3799-1

Timeline

  1. 19-09-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to validate import directory path configuration which allows admin users to execute arbitrary code via malicious plugin upload to prepackaged plugins directory

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

0.00 pp

From 0.64% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.64%

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

Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
  • mattermost≥ 10.8.0, ≤ 10.8.3 | ≥ 10.5.0, ≤ 10.5.8 | ≥ 9.11.0, ≤ 9.11.17 | ≥ 10.10.0, ≤ 10.10.1 | ≥ 10.9.0, ≤ 10.9.3
  • mattermost_server≥ 9.11.0, < 9.11.18 | ≥ 10.5.0, < 10.5.9 | ≥ 10.8.0, < 10.8.4 | ≥ 10.9.0, < 10.9.4 | ≥ 10.10.0, < 10.10.2
Github.com/mattermost1 product
  • mattermost-server≥ 10.8.0, < 10.8.4 | ≥ 10.5.0, < 10.5.9 | ≥ 9.11.0, < 9.11.18 | ≥ 10.10.0, < 10.10.2 | ≥ 10.9.0, < 10.9.4 | ≥ 10.10.0+incompatible, < 10.10.2+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8< 8.0.0-20250707221302-a8fa77f107ef

4 vendors · 6 products

References

11 links
Show all 11 references