SB2021082406 - Multiple vulnerabilities in WP Upload Restriction plugin for WordPress

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Improper access control (CVE-ID: CVE-2021-34627)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the "getSelectedMimeTypesByRole" function. A remote authenticated attacker can bypass implemented security restrictions and retrieve approved mime types for any given role.

2) Improper access control (CVE-ID: CVE-2021-34626)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the "deleteCustomType" function. A remote authenticated attacker can bypass implemented security restrictions and delete custom extensions.

3) Stored cross-site scripting (CVE-ID: CVE-2021-34625)

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 the "saveCustomType" function. 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

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34627
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34625