CVE-2026-28343
MEDIUM
GHSA-jrqm-vmqc-gm93
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Description
CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. Prior to version 47.6.0, a cross-site scripting (XSS) vulnerability has been discovered in the General HTML Support feature. This vulnerability could be triggered by inserting specially crafted markup, leading to unauthorized JavaScript code execution, if the editor instance used an unsafe General HTML Support configuration. This issue has been patched in version 47.6.0.
Analysis
CKEditor 5 versions before 47.6.0 contain a stored XSS vulnerability in the General HTML Support feature that allows attackers to execute arbitrary JavaScript by injecting malicious markup into documents processed by vulnerable editor instances. This vulnerability affects users relying on unsafe General HTML Support configurations, potentially enabling session hijacking, credential theft, or malware distribution. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today