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OpenAdvisories
Medium · 6.1 CVE-2021-39325 EUVD-2021-25686GHSA-q4c3-5fjh-5v6h

OptinMonster <= 2.6.0 Reflected Cross-Site Scripting

Published Sep 20, 2021 · Updated Mar 31, 2025 · Assigned by Wordfence

Description

The OptinMonster WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to insufficient input validation in the load_previews function found in the ~/OMAPI/Output.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.6.0.

Affected products

VendorProductAffectedFixed
OptinMonster OptinMonster 2.6.0 – ≤ 2.6.0 —

References