CVE-2016-1209
The Ninja Forms plugin before 2.9.42.1 for WordPress allows remote attackers to conduct PHP object injection attacks via crafted serialized values in a POST request.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 61.6%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
The Ninja Forms plugin before 2.9.42.1 for WordPress allows remote attackers to conduct PHP object injection attacks via crafted serialized values in a POST request.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 61.61% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 4 May 2016
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- ninjaforms/ninja forms
- Source
- vultures@jpcert.or.jp
EPSS moved from 56.4% on 21 September 2026 to 61.6% on 4 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://jvn.jp/en/jp/JVN44657371/index.htmlVendor Advisory
- http://jvndb.jvn.jp/jvndb/JVNDB-2016-000064Vendor Advisory
- http://packetstormsecurity.com/files/137211/WordPress-Ninja-Forms-Unauthenticated-File-Upload.htmlExploit
- http://www.pritect.net/blog/ninja-forms-2-9-42-critical-security-vulnerabilities
- http://www.rapid7.com/db/modules/exploit/unix/webapp/wp_ninja_forms_unauthenticated_file_uploadExploit
- https://ninjaforms.com/important-security-update-always-hurt-ones-love/
- https://wordpress.org/plugins/ninja-forms/changelog/
- https://wpvulndb.com/vulnerabilities/8485
- http://jvn.jp/en/jp/JVN44657371/index.htmlVendor Advisory
- http://jvndb.jvn.jp/jvndb/JVNDB-2016-000064Vendor Advisory
- http://packetstormsecurity.com/files/137211/WordPress-Ninja-Forms-Unauthenticated-File-Upload.htmlExploit
- http://www.pritect.net/blog/ninja-forms-2-9-42-critical-security-vulnerabilities
- http://www.rapid7.com/db/modules/exploit/unix/webapp/wp_ninja_forms_unauthenticated_file_uploadExploit
- https://ninjaforms.com/important-security-update-always-hurt-ones-love/
- https://wordpress.org/plugins/ninja-forms/changelog/
- https://wpvulndb.com/vulnerabilities/8485
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.