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Fencer Intel
critical 9.8

CVE-2016-1209 in the critical feed json

The Ninja Forms plugin before 2.9.42.1 for WordPress allows remote attackers to conduct PHP object injection attacks via crafted serialized…

published 2016-05-14 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-2310

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
61.6%
EPSS 61.6% chance of exploitation in 30 days, percentile 99.1%
public exploits
2
Metasploit, Exploit-DB

Summary

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.

Timeline

  1. First public exploit (Metasploit exploit/multi/http/wp_ninja_forms_unauthenticated_file_upload)
  2. Published

Exploit prediction

61.61% chance of exploitation in the next 30 days, higher than 99.1% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Metasploit exploit/multi/http/wp_ninja_forms_unauthenticated_file_upload WordPress Ninja Forms Unauthenticated File Upload metasploit exploit, excellent rank, 2016-05-04
  • EDB-41692 WordPress Plugin Ninja Forms 2.9.36 < 2.9.42 - File Upload (Metasploit) webapps, 2016-05-04
  • rapid7.com http://www.rapid7.com/db/modules/exploit/unix/webapp/wp_ninja_forms_unauthenticated_file_upload referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/137211/WordPress-Ninja-Forms-Unauthenticated-File-Upload.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.