CVE-2023-43659 HIGH

CVE-2023-43659: Cross-site Scripting via email preview when CSP disabled in Discourse

Vendor Discourse
Product discourse
Weakness CWE-79 · XSS
Published October 16, 2023
Last update September 16, 2024
View on NVD All CVEs

CVSS base score

8.0/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Discourse is an open source platform for community discussion. Improper escaping of user input allowed for Cross-site Scripting attacks via the digest email preview UI. This issue only affects sites with CSP disabled. This issue has been patched in the 3.1.1 stable release as well as the 3.2.0.beta1 release. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.

Key dates

02Disclosure timeline

October 16, 2023 CVE published
September 16, 2024 Record updated