PT-2025-34258 · Mattermost · Mattermost

Daw10 · Published 2025-08-21 · Updated 2025-08-29 · CVE-2025-6465

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Mattermost versions 10.8.x through 10.8.3 Mattermost versions 10.5.x through 10.5.8 Mattermost versions 10.10.x through 10.10.0 Mattermost versions 10.9.x through 10.9.3

Description: The application fails to sanitize file names, potentially allowing users with file upload permissions to overwrite file attachment thumbnails through path traversal in file streaming APIs.

Recommendations: Mattermost versions 10.8.x through 10.8.3: Implement robust file name sanitization to prevent path traversal vulnerabilities. Mattermost versions 10.5.x through 10.5.8: Implement robust file name sanitization to prevent path traversal vulnerabilities. Mattermost versions 10.10.x through 10.10.0: Implement robust file name sanitization to prevent path traversal vulnerabilities. Mattermost versions 10.9.x through 10.9.3: Implement robust file name sanitization to prevent path traversal vulnerabilities.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2025-6465

GHSA-PJ6F-RC94-GW53

GO-2025-3910

Affected Products

Mattermost

References · 12

• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-3910 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-pj6f-rc94-gw53 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-6465 · Security Note
• https://osv.dev/vulnerability/CVE-2025-6465 · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://twitter.com/CVEnew/status/1958603382442402120 · Twitter Post
• https://pkg.go.dev/vuln/GO-2025-3906 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-6465 · Note
• https://github.com/advisories/GHSA-pj6f-rc94-gw53 · Note
• https://twitter.com/VulmonFeeds/status/1958601610772222297 · Twitter Post
• https://t.me/CVEtracker/30608 · Telegram Post