PT-2025-34198 · Mattermost · Mattermost

Dawid Kulikowski · Published 2025-08-21 · Updated 2025-08-29 · CVE-2025-8023

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Mattermost versions 10.5.x through 10.5.8 Mattermost versions 9.11.x through 9.11.17 Mattermost versions 10.8.x through 10.8.3 Mattermost versions 10.9.x through 10.9.2

Description: Mattermost fails to sanitize path traversal sequences in template file destination paths. This allows a system administrator to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.

Recommendations: Update Mattermost to a version later than 10.5.8. Update Mattermost to a version later than 9.11.17. Update Mattermost to a version later than 10.8.3. Update Mattermost to a version later than 10.9.2.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2025-8023

GHSA-X67C-V8JR-P29R

GO-2025-3907

Affected Products

Mattermost

References · 12

• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-8023 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-8023 · Security Note
• https://osv.dev/vulnerability/GHSA-x67c-v8jr-p29r · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-3907 · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://twitter.com/CVEnew/status/1958444192360751166 · Twitter Post
• https://pkg.go.dev/vuln/GO-2025-3907 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-8023 · Note
• https://github.com/advisories/GHSA-x67c-v8jr-p29r · Note
• https://t.me/CVEtracker/30572 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1958481287703867776 · Twitter Post