CVE-2023-30538
Assigner: GitHub_M
Published: 2023-04-18T21:25:58.848Z
State: PUBLISHED
title: Stored Cross-site Scripting via improper sanitization of svg files in Discourse
problemTypes: descriptions: cweId: CWE-79
description: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
type: CWE
metrics: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 5.4
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
version: 3.1
affected: vendor: discourse
product: discourse
versions: version: stable: < 3.0.3
status: affected
version: beta: < 3.1.0.beta4
status: affected
descriptions: value: 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). 
source: advisory: GHSA-w5mv-4pjf-xj43
discovery: UNKNOWN