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Security Advisories

CVE-2025-21088

Published

Last updated

NVD

https://nvd.nist.gov/vuln/detail/CVE-2025-21088

CGA ID

CGA-3cjr-6ggf-57v6

Severity

6.5

Medium

CVSS V3

Summary

Mattermost Incorrect Type Conversion or Cast

Description

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.

References

  • https://images.chainguard.dev/security/CGA-3cjr-6ggf-57v6
  • https://github.com/advisories/GHSA-8j3q-gc9x-7972
  • https://nvd.nist.gov/vuln/detail/CVE-2025-21088
  • https://github.com/mattermost/mattermost
  • https://mattermost.com/security-updates
  • https://pkg.go.dev/vuln/GO-2025-3393

Affected packages

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