Cross-site scripting in Discourse - CVE-2024-52794
Published: December 19, 2024 / Updated: July 1, 2026
Vulnerability identifier: #VU136101
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2024-52794
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary script code in a user's browser.
The vulnerability exists due to cross-site scripting in the magnific lightbox feature when handling lightbox thumbnail clicks. A remote user can craft malicious content that is triggered when a user clicks a lightbox thumbnail to execute arbitrary script code in a user's browser.
User interaction is required to click a lightbox thumbnail.
Affected software
Discourse
How to mitigate CVE-2024-52794
Install security update from vendor's website.
Discourse - addressed in versions 3.3.3, 3.4.0 beta4