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CVE-2023-30538 Details

Description

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).

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43	CVE	MitigationThird Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43	[email protected]	MitigationThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
discourse discourse	<= 3.0.2 < 3.1.0 3.1.0 beta1 3.1.0 beta2 3.1.0 beta3
CPE cpe:2.3:a:discourse:discourse:::::stable:::* cpe:2.3:a:discourse:discourse:::::beta:::* cpe:2.3:a:discourse:discourse:3.1.0:beta1:::beta:::* cpe:2.3:a:discourse:discourse:3.1.0:beta2:::beta:::* cpe:2.3:a:discourse:discourse:3.1.0:beta3:::beta:::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Apr 28, 2023	Initial Analysis	[email protected]