CVE-2021-34637: Post Index Project Post Index

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

The Post Index WordPress plugin is vulnerable to Cross-Site Request Forgery via the OptionsPage function found in the ~/php/settings.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.7.5.

Affected products

• Post Index Project Post Index: up to and including 0.7.5

Published 2021-08-02. Last modified 2026-06-17.