CVE-2026-91827
The Ninja Forms WordPress plugin 3.15.3 does not prevent user-submitted form field values from being deserialised when an administrator later exports form submissions to CSV, allowing unauthenticated attackers to perform PHP Object Injection; if a suitable POP chain is present via another installed plugin or theme, this can lead to actions such as arbitrary file operations or remote code execution.
- Published Sep 22, 2026
- CVSS 7.5 high
- 0.3% chance of exploitation in the next 30 days (EPSS)