Cross-site scripting in CKEditor - #VU55817
Published: August 12, 2021
Vulnerability identifier: #VU55817
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the Clipboard plugin. A remote attacker can inject and execute arbitrary HTML code into editor.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
CKEditor
Backdrop CMS
Drupal
Backdrop CMS
Drupal
Remediation
Install updates from vendor's website.
CKEditor - update to 4.16.2
Backdrop CMS - addressed in versions 1.18.7, 1.19.3
Drupal - addressed in versions 8.9.18, 9.1.12, 9.2.4
Backdrop CMS - addressed in versions 1.18.7, 1.19.3
Drupal - addressed in versions 8.9.18, 9.1.12, 9.2.4