EUVD-2026-84283
GHSA-jvgp-rj42-qjww
Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Unauthenticated payload injection (PR:N) over the network, but AC:H (requires an external POP chain) and UI:R (admin must run CSV export); full C/I/A:H reflects potential RCE via the gadget chain.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
5DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
PHP Object Injection in the Ninja Forms WordPress plugin 3.15.3 allows unauthenticated attackers to plant serialized payloads in user-submitted form field values that are later deserialized when an administrator exports submissions to CSV. Publicly available exploit code exists, but full impact - arbitrary file operations or remote code execution - is conditional on a suitable POP gadget chain being present in another installed plugin or theme; without such a chain, the object injection has limited practical impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the Ninja Forms plugin version 3.15.3, which deserializes user-submitted form field values during the administrator CSV export of form submissions. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H, base 7.5) describes an unauthenticated network-reachable flaw whose full C:H/I:H/A:H impact is explicitly conditional - the description states RCE/file operations occur only 'if a suitable POP chain is present via another installed plugin or theme.' That conditionality is correctly reflected in AC:H and is the single most important risk qualifier: without a usable POP gadget chain in the co-installed plugin/theme stack, the primary object-injection sink yields limited or no impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch or fixed version is identified in the provided intelligence at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WordPress sites running Ninja Forms 3.15.3, restrict administrative access to trusted personnel, and consider temporarily disabling the CSV export feature or the entire plugin if feasible; also deploy a web application firewall (WAF) rule to block serialized payloads in form submissions. …
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External POC / Exploit Code
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