SB2021110810 - Stored cross-site scripting in Notification – Custom Notifications and Alerts for WordPress plugin

Description

This security bulletin contains information about 1 security vulnerability.

1) Stored cross-site scripting (CVE-ID: CVE-2021-39340)

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 several parameters in the ~/src/classes/Utils/Settings.php file. A remote authenticated 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://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/Utils/Settings.php#L167
• https://github.com/BigTiger2020/word-press/blob/main/Notification.md
• https://wordfence.com/vulnerability-advisories/#CVE-2021-39340