Cross-site scripting in WebSpellChecker Dialog plugin for CKEditor

1) DOM-based cross-site scripting

EUVDB-ID: #VU26197

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

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 within WYSIWYG mode in  WebSpellChecker Dialog plugin for CKEditor. A remote attacker can trick the victim to execute certain actions with content in WYSIWYG mode 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WebSpellChecker Dialog: 4.4 - 5.5.7.4

External links

http://ckeditor.com/blog/CKEditor-4.14-with-Paste-from-LibreOffice-released/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.