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    CVE-2026-2461

    Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559

    Published:Mar 16, 2026
    Last Modified:Mar 30, 2026
    EPS:Mar 16, 2026
    EPSS Score:0.00031
    CVSS Score:4.3

    Affected Products

    Vendor
    Mattermost
    Product
    Mattermost Server

    Exploits

    https://github.com/destiny-creates/CVE-2026-2461-poc

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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