What’s Vulnerable › Vulnerabilities

CVE-2023-4771: Cross-Site Scripting vulnerability in CKSource CKEditor

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-16 · updated 2026-06-17
• Weakness: CWE-79

Description

A Cross-Site scripting vulnerability has been found in CKSource CKEditor affecting versions 4.15.1 and earlier. An attacker could send malicious javascript code through the /ckeditor/samples/old/ajax.html file and retrieve an authorized user's information.

Affected products

• CKSource CKEditor: through 4.15.1

References

• https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-vulnerability-cksource-ckeditor
• https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-vulnerability-cksource-ckeditor

Get alerted when CVE-2023-4771 or the next vulnerability affects your stack