UpHeron
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Servers and applications

CVE-2025-27936

Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.

Severity
Medium 5.9
Published
16 Apr 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
10.5.2
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • Every version before 10.5.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-27936
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-27936