SB2020062312 - Stored cross-site scripting in tui-editor package for npm

Description

This security bulletin contains information about 1 vulnerability.

1) Stored cross-site scripting (CVE-ID: N/A)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear

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 "firstLine" When used in WYSIWYG only mode. 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.

Remediation

Install update from vendor's website.

References

• https://snyk.io/vuln/SNYK-JS-TUIEDITOR-571463
• https://github.com/nhn/tui.editor/issues/1021
• https://github.com/nhn/tui.editor/pull/1022
• https://github.com/nhn/tui.editor/blob/master/apps/editor/src/js/wwCodeBlockManager.js#L354