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  5. CVE-2017-18873

CVE-2017-18873: Mattermost Server is vulnerable to channel invisibility DoS via misformatted post

May 24, 2022 (updated January 5, 2026)

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to cause a denial of service (channel invisibility) via a misformated post.

References

  • github.com/advisories/GHSA-x6mw-hf2j-vqpc
  • github.com/mattermost/mattermost
  • github.com/mattermost/mattermost/commit/9adaf53e110e0e806b21903111aacb93129668cb
  • github.com/mattermost/mattermost/commit/b3e4b0ac91682093276a653f7ccd5774aaa9cd06
  • github.com/mattermost/mattermost/commit/ee57a5829ab162859e0e355dac6cfe6ca1a8f379
  • mattermost.com/security-updates
  • nvd.nist.gov/vuln/detail/CVE-2017-18873

Code Behaviors & Features

Detect and mitigate CVE-2017-18873 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions starting from 4.3.0-rc1 before 4.3.0

Fixed versions

  • 4.3.0

Solution

Upgrade to version 4.3.0 or above.

Impact 5.3 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Learn more about CVSS

Weakness

  • CWE-20: Improper Input Validation

Source file

go/github.com/mattermost/mattermost-server/CVE-2017-18873.yml

Spotted a mistake? Edit the file on GitLab.

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