Search/CVE-2025-27936
● CVE — Medium

CVE-2025-27936

VendormattermostProductmattermost server, ms teamsDiscoveredApr 16, 2025UpdatedJan 14, 2026

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.

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CVSS v3.1
5.3 MEDIUM
EPSS
0.34%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 22, 2026
▲ 0.03pp
0.32% → 0.34% over 4 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityNONE
AvailabilityNONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Connections
3 relationships
Timeline
disclosure → media coverage
Apr 16, 2025
Disclosure — published as a CVE record. · last revised by NVD Jan 14, 2026