SB2020061517 - Multiple vulnerabilities in comments plugin for Craft CMS

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cross-site request forgery (CVE-ID: CVE-2020-13868)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin in "CommentsController.php". A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

2) Stored cross-site scripting (CVE-ID: CVE-2020-13870)

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 asset volume name. A remote attacker can permanently 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://github.com/verbb/comments/blob/craft-3/CHANGELOG.md#155---2020-05-28-critical
• https://github.com/verbb/comments/commit/5432bc1ccbd9044a50262914a949450fc65250ac