CVE-2023-47120

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    CVE-2023-47120

    Published: 10 Nov 2023Last Modified: 6 Oct 2026

    Summary: Discourse DoS through Onebox favicon URL

    Details: Discourse is an open source platform for community discussion. In versions 3.1.0 through 3.1.2 of the `stable` branch and versions 3.1.0,beta6 through 3.2.0.beta2 of the `beta` and `tests-passed` branches, Redis memory can be depleted by crafting a site with an abnormally long favicon URL and drafting multiple posts which Onebox it. The issue is patched in version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches. There are no known workarounds.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/47xxx/CVE-2023-47120.json, https://github.com/discourse/discourse/security/advisories/GHSA-77cw-xhj8-hfp3, https://nvd.nist.gov/vuln/detail/CVE-2023-47120, https://github.com/discourse/discourse/commit/95a82d608d6377faf68a0e2c5d9640b043557852, https://github.com/discourse/discourse/commit/e910dd09140cb4abc3a563b95af4a137ca7fa0ce

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0876f262e932da2478ed1d2ec275bd2153001213
    Fixed -4f64a829e552993a9e6fcc7f77b826f56683551d

    Affected versions

    3.1.0-beta6
    3.1.0-beta7
    3.1.0-beta8

    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-2023-47120 | CVE-DB