CVE-2021-4405: 10up Elasticpress

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

The ElasticPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.5.3. This is due to missing or incorrect nonce validation on the epio_send_autosuggest_allowed() function. This makes it possible for unauthenticated attackers to send allowed parameters for autosuggest to elasticpress[.]io via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• 10up Elasticpress: up to and including 3.5.3

Published 2023-07-01. Last modified 2026-06-17.