Cross-site scripting in CKEditor - CVE-2021-41164

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Main Vulnerability Database Vulnerabilities #VU58220

Cross-site scripting in CKEditor - CVE-2021-41164

Published: November 18, 2021


Vulnerability identifier: #VU58220
CSH Severity: Medium
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-2021-41164
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 Advanced Content Filter (ACF) core module. A remote attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

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
IBM Sterling B2B Integrator
Fedora
IBM Engineering Requirements Management DOORS Next
ckeditor

How to mitigate CVE-2021-41164

Install updates from vendor's website.

CKEditor - update to 4.17.0
Backdrop CMS - addressed in versions 1.19.5, 1.20.2
IBM Sterling B2B Integrator - addressed in versions 6.0.3.7, 6.1.0.6, 6.1.1.2, 6.1.2.1, 6.1.2.6, 6.2.0.3
Drupal - addressed in versions 8.9.20, 9.1.14, 9.2.9
IBM Engineering Requirements Management DOORS Next - update to 9.7.2.8
ckeditor - addressed in versions 4.20.0-1.el7, 4.20.0-1.fc36, 4.20.0-1.fc37

External References

Related Security Bulletins