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OpenAdvisories
High · 8.2 Scanner template CVE-2021-39341 EUVD-2021-25702GHSA-whcc-jgf3-q7pm

OptinMonster <= 2.6.4 Unprotected REST-API Endpoints

Published Nov 1, 2021 · Updated Mar 31, 2025 · Assigned by 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.

Affected products

VendorProductAffectedFixed
OptinMonster OptinMonster 2.6.4 – ≤ 2.6.4 —

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

References