CVE-2026-91827 — HIGH (7.5)

Vulnerability 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.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-502

References

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

FAQ

What is CVE-2026-91827?

CVE-2026-91827 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...

How severe is CVE-2026-91827?

CVE-2026-91827 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-91827?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.