OptinMonster <= 2.6.4 - Unprotected REST-API Endpoints

8.2
Improper Authorization
CVE CVE-2021-39341
CVSS 8.2 (High)
Publicly Published November 1, 2021
Last Updated February 3, 2023
Researcher Chloe Chamberland - Wordfence

Description

The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4.

Wordfence blocked 126 attacks targeting this vulnerability in the past 24 hours.

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Vulnerability Details for Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation

Software Type Plugin
Software Slug optinmonster (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.6.5, or a newer patched version
Affected Version
  • <= 2.6.4
Patched Version
  • 2.6.5

Recent vulnerabilities in Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation

# Title CVE ID CVSS Researchers Date
1 Popup Builder by OptinMonster – WordPress Popups for Optins, Email Newsletters and Lead Generation <= 2.16.1 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2024-4045 6.4 wesley (wcraft) May 24, 2024
2 Popup Builder by OptinMonster – WordPress Popups for Optins, Email Newsletters and Lead Generation <= 2.15.3 - Cross-Site Request Forgery to Notice Dismissal CVE-2024-33691 4.3 Dhabaleshwar Das April 26, 2024
3 OptinMonster <= 2.12.1 - Authenticated (Subscriber+) Sensitive Information Disclosure via Shortcode CVE-2023-0772 4.3 Erwan LR March 3, 2023
4 OptinMonster <= 2.6.0 - Reflected Cross-Site Scripting CVE-2021-39325 6.1 Mariia Aleksandrova September 20, 2021
5 Popup Builder by OptinMonster <= 1.1.4.5 - Remote Code Execution CVE-2016-10996 5.3 James Golovich January 14, 2016

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