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    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.

    Published:Apr 16, 2025
    Last Modified:Jan 14, 2026
    EPS:Apr 16, 2025
    EPSS Score:0.00063
    CVSS Score:5.3

    Affected Products

    Vendor
    Mattermost
    Product
    Mattermost Server
    Vendor
    Mattermost
    Product
    Ms Teams

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-208 Observable Timing Discrepancy

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High