CVE-2023-45806

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    CVE-2023-45806

    Published: 10 Nov 2023Last Modified: 6 Oct 2026

    Summary: Discourse vulnerable to DoS via Regexp Injection in Full Name

    Details: Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches, if a user has been quoted and uses a `|` in their full name, they might be able to trigger a bug that generates a lot of duplicate content in all the posts they've been quoted by updating their full name again. Version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches contain a patch for this issue. No known workaround exists, although one can stop the "bleeding" by ensuring users only use alphanumeric characters in their full name field.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45806.json, https://github.com/discourse/discourse/security/advisories/GHSA-hcgf-hg2g-mw78, https://nvd.nist.gov/vuln/detail/CVE-2023-45806, https://github.com/discourse/discourse/commit/2ec25105179199cf80912bf011c18b8b870e1863, https://github.com/discourse/discourse/commit/7d484864fe91ff79c478f57e7ddb1235d701921e

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -4f64a829e552993a9e6fcc7f77b826f56683551d

    Affected versions

    3.2.0-beta1
    3.2.0-beta2

    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-2023-45806 | CVE-DB