Deserialization in Ninjaforms Ninja Forms
CVE-2025-9083
The Ninja Forms WordPress plugin before 3.11.1 unserializes user input via form field, which could allow Unauthenticated users to perform PHP Object Injection when a suitable gadget is present on the blog.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (44.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Ninjaforms Ninja Forms
- Ninja Forms — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/60b4d7fc-5d23-4dcf-bd7f-e202cabc2625/ (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2025-9083?
- CVE-2025-9083 is a critical-severity vulnerability in Ninjaforms Ninja Forms, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-09-18.
- How severe is CVE-2025-9083?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-9083 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.