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    CVE-2021-27899

    The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.

    Published:Apr 6, 2021
    Last Modified:Nov 21, 2024
    EPS:Apr 6, 2021
    EPSS Score:0.00107
    CVSS Score:7.4

    Affected Products

    Vendor
    Proofpoint
    Product
    Insider Threat Management

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-295 Improper Certificate Validation

    Related CVEs

    CVE-2023-4828 (CVSS 6.4) — An improper check for an exceptional condition in the Insider Threat Management (ITM) Server could be used by …
    CVE-2023-4803 (CVSS 4.8) — A reflected cross-site scripting vulnerability in the WriteWindowTitle endpoint of the Insider Threat Manageme…
    CVE-2023-4802 (CVSS 4.8) — A reflected cross-site scripting vulnerability in the UpdateInstalledSoftware endpoint of the Insider Threat M…
    CVE-2023-4801 (CVSS 7.5) — An improper certification validation vulnerability in the Insider Threat Management (ITM) Agent for MacOS coul…
    CVE-2023-2818 (CVSS 5.5) — An insecure filesystem permission in the Insider Threat Management Agent for Windows enables local unprivilege…
    CVE-2022-25294 (CVSS 7.8) — Proofpoint Insider Threat Management Agent for Windows relies on an inherently dangerous function that could e…
    CVE-2021-27900 (CVSS 8.1) — The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) is missing an authorization check …
    CVE-2021-22158 (CVSS 7.2) — The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) is vulnerable to XML external enti…
    CVE-2021-22157 (CVSS 6.1) — Proofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.11.1 allows stored XSS.…
    CVE-2021-22159 (CVSS 7.8) — Insider Threat Management Windows Agent Local Privilege Escalation Vulnerability The Proofpoint Insider Threat…

    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