CVE-2021-39341

OptinMonster <= 2.6.4 Unprotected REST-API Endpoints

Published Nov 1, 2021 CVSS 3.1 · 8.2 High EPSS 21.9% KEV · Not listed
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.

Remediation

Vendor Solution

Update to version 2.6.5, or newer.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Mar 31, 2025, 5:45 PM
Reserved
Aug 20, 2021, 12:00 AM
Status
Modified
Published
Nov 1, 2021, 9:15 PM
Modified
Jun 17, 2026, 4:03 AM