CVE-2021-4405

Summary

CVE-2021-4405 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the ElasticPress plugin for WordPress. Versions up to and including 3.5.3 are impacted, due to insufficient nonce validation in the epio_send_autosuggest_allowed() function. This issue allows unauthenticated attackers to send malicious parameters for autosuggest to elasticpress[.]io by tricking a site administrator into performing a specified action, such as clicking a link. The vulnerability poses a significant risk, as it enables unauthorized modification or access to sensitive information. Users are encouraged to update to the latest version of ElasticPress to mitigate this issue.

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