CVE-2023-30538

    Dashboard / Vulnerabilities / CVE-2023-30538

    CVE-2023-30538

    Published: 18 Apr 2023Last Modified: 29 Sept 2026

    Summary: Stored Cross-site Scripting via improper sanitization of svg files in Discourse

    Details: Discourse is an open source platform for community discussion. Due to the improper sanitization of SVG files, an attacker can execute arbitrary JavaScript on the users’ browsers by uploading a crafted SVG file. This issue is patched in the latest stable and tests-passed versions of Discourse. Users are advised to upgrade. For users unable to upgrade there are two possible workarounds: enable CDN handing of uploads (and ensure the CDN sanitizes SVG files) or disable SVG file uploads by ensuring that the `authorized extensions` site setting does not include `svg` (or reset that setting to the default, by default Discourse doesn't enable SVG uploads by users).

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/30xxx/CVE-2023-30538.json, https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43, https://nvd.nist.gov/vuln/detail/CVE-2023-30538

    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-2023-30538 | CVE-DB