CVE-2018-5216: Radiant CMS vulnerable to Cross-site Scripting
5.4
CVSS Score
3.0
Basic Information
CVE ID
GHSA ID
EPSS Score
0.43188%
CWE
Published
1/6/2018
Updated
2/3/2023
KEV Status
No
Technology
Ruby
Technical Details
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
---|---|---|---|
radiant | rubygems | <= 1.1.4 |
Vulnerability Intelligence
Miggo AI
Root Cause Analysis
The XSS vulnerability manifests when Markdown input containing HTML payloads (like <svg onload=alert(0)>) is processed and rendered. Radiant CMS's Markdown filter is responsible for converting Markdown to HTML. Since the exploit requires the 'Markdown' filter selection and results in unescaped HTML execution, the vulnerability likely resides in the MarkdownFilter
's rendering logic where HTML sanitization is omitted. The absence of patched versions and the CWE-79 classification further support this conclusion.