CVE-2026-91827
Ninja Forms 3.15.3 - Unauthenticated PHP Object Injection via CSV Export
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | unknown |
| Product | ninja forms |
| Published | Sep 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Unknown / Ninja Forms
3.15.3 < 3.15.4
References
Credits
Karthik Ramakrishnan WPScan