Cross-site scripting in CKEditor - CVE-2021-32808

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Main Vulnerability Database Vulnerabilities #VU55858

Cross-site scripting in CKEditor - CVE-2021-32808

Published: August 16, 2021


Vulnerability identifier: #VU55858
CSH Severity: Low
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-2021-32808
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 Widget plugin if used alongside the undo feature. A remote authenticated attacker can trick the victim to follow a specially crafted link 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
IBM Sterling B2B Integrator
Fedora
Ubuntu
ckeditor (Ubuntu package)
ckeditor

How to mitigate CVE-2021-32808

Install updates from vendor's website.

CKEditor - update to 4.16.2
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
ckeditor (Ubuntu package) - addressed in versions 4.5.7+dfsg-2ubuntu0.18.04.1, 4.12.1+dfsg-1ubuntu0.1, 4.16.0+dfsg-2ubuntu0.1
ckeditor - addressed in versions 4.16.2-1.el7, 4.16.2-1.fc33, 4.16.2-1.fc34, 4.16.2-1.fc35

External References

Related Security Bulletins