CVE-2026-91827

high

Description

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.

References

https://wpscan.com/vulnerability/7b279db2-92e0-4122-b5c6-aa12b7b01858/

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84283

Details

Source: Mitre, NVD

Published: 2026-09-22

Updated: 2026-09-22

Risk Information

CVSS v2

Base Score: 7.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00304