CVE-2023-5876

    Dashboard / Vulnerabilities / CVE-2023-5876

    CVE-2023-5876

    Published: 2 Nov 2023Last Modified: 12 Aug 2026

    Summary: Regex DoS from a malicious server enrolled in Desktop

    Details: Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.

    References: https://mattermost.com/security-updates, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5876.json, https://nvd.nist.gov/vuln/detail/CVE-2023-5876

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -db8645b21b86fe368938d53b202c1014a929ab45

    Affected versions

    v5.5.1-rc.4
    v5.5.1-rc.3
    v5.5.1-rc.2
    v5.5.0
    v5.5.0-mas.1
    v5.5.0-rc.2
    v5.5.0-rc.1

    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
    CVE-2023-5876 | CVE-DB