CVE-2023-30538 — Stored Cross-site Scripting via improper sanitization of svg files in Discourse

Description (CNA)

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).

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected stable: < 3.0.3; affected beta: < 3.1.0.beta4

CWE

CWE-79

References

https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43

ADP enrichment

CVE

No English description supplied.

https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43

CISA-ADP

No English description supplied.

No references supplied.