SB2021090210 - Multiple vulnerabilities in Nested Pages plugin for WordPress

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Open redirect (CVE-ID: CVE-2021-38343)

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data in the "page" parameter in the npBulkActions, npBulkEdit, npListingSort, and npCategoryFilter admin_post actions. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

2) Cross-site request forgery (CVE-ID: CVE-2021-38342)

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 the npBulkActions and npBulkEdit admin_post actions. 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.

Remediation

Install update from vendor's website.

References

• https://www.wordfence.com/blog/2021/08/nested-pages-pat…on-vulnerability/
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39316