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CVE-2016-11066: Mattermost Server: initial_load API exposes unnecessary information

May 24, 2022 (updated October 21, 2025)

An issue was discovered in Mattermost Server before 3.1.1. The initial_load API disclosed unnecessary personal information.

References

  • github.com/advisories/GHSA-r93j-3mmp-px57
  • github.com/mattermost/mattermost
  • github.com/mattermost/mattermost/commit/f89e7c6d543a82d6078c2ca0f892914d7976a6f5
  • mattermost.com/security-updates
  • nvd.nist.gov/vuln/detail/CVE-2016-11066

Code Behaviors & Features

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Affected versions

All versions before 3.1.1

Fixed versions

  • 3.1.1

Solution

Upgrade to version 3.1.1 or above.

Impact 7.5 HIGH

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

Learn more about CVSS

Weakness

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-359: Exposure of Private Personal Information to an Unauthorized Actor

Source file

go/github.com/mattermost/mattermost-server/CVE-2016-11066.yml

Spotted a mistake? Edit the file on GitLab.

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