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Unauthenticated form entry overwrite in NEX-Forms WordPress plugin

Priority LOW 30CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-639.

Summary

The NEX-Forms WordPress plugin from 9.2.1 before 9.3.1 is affected. It does not perform authorization, ownership or request validation checks before updating stored form entries (CWE-639). An unauthenticated remote attacker can overwrite, erase, reassign or append to any submitted form entry by referencing its sequential identifier. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The NEX-Forms WordPress plugin before 9.3.1 does not perform any authorization, ownership or request-validation checks before updating stored form entries, allowing unauthenticated attackers to overwrite, permanently erase, reassign or append to any previously submitted form entry by referencing its sequential identifier.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed NEX-Forms (Unknown): 9.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownNEX-Forms9.2.1 to before 9.3.19.3.1Patch availableCNA
  • NEX-Forms VendorUnknown Affected 9.2.1 to before 9.3.1 Fixed in 9.3.1 Patch available CNA

Remediation

Update the NEX-Forms WordPress plugin to version 9.3.1, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA NEX-Forms (Unknown) Fixed in 9.3.1

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-106166
  2. 2026-10-14 Alias added: GHSA-wp3w-fh35-w7pm
  3. 2026-10-14 CVSS score added · CISA ADP
  4. 2026-10-14 Weakness changed · CISA ADP
  5. 2026-10-14 CISA SSVC decision points changed

References

Sources