CVE-2023-29196

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    CVE-2023-29196

    Published: 18 Apr 2023Last Modified: 29 Sept 2026

    Summary: HTML injection via topic embedding in Discourse

    Details: Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in embedding Javascript that does pass the CSP, it could result in session hijacking for any users that view the attacker’s post. The vulnerability is patched in the latest tests-passed, beta and stable branches. Users are advised to upgrade. Users unable to upgrade should enable and/or restore your site's CSP to the default one provided with Discourse. Remove any embed-able hosts configured.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/29xxx/CVE-2023-29196.json, https://github.com/discourse/discourse/security/advisories/GHSA-986p-4x8q-8f48, https://nvd.nist.gov/vuln/detail/CVE-2023-29196

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 59dd20c4153cef96ff0e848a087af4464a4bdcce
    Fixed -None

    Affected versions

    beta: < 3.1.0.beta4

    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-2023-29196 | CVE-DB