CVE-2021-39341 HIGH

CVE-2021-39341: OptinMonster <= 2.6.4 Unprotected REST-API Endpoints

Vendor Optinmonster
Product OptinMonster
Weakness CWE-285
Published November 1, 2021
Last update March 31, 2025
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 1, 2021 CVE published
March 31, 2025 Record updated