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TI-2026-09286 Aliases CVE-2026-10818GHSA-g685-9q2w-88f4

WPForms Pro <= 1.10.1.1 - Unauthenticated Arbitrary File Write via Chunked Upload Init/Finalize Ordering

Priority MEDIUM 42CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

The WPForms Pro plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.10.1.1 via the ajax_chunk_upload_finalize function. This is due to the file type validation occurring after chunk metadata and file contents have already been written to disk, and the assembled file not being deleted upon validation failure. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02482 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
WPFormsWPForms Proup to 1.10.1.1—No fix listedCNA
  • WPForms Pro VendorWPForms Affected up to 1.10.1.1 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-10818
  2. 2026-10-03 Alias added: GHSA-g685-9q2w-88f4
  3. 2026-10-07 Priority changed: LOW → MEDIUM

References

Other 2

  • TI-2022-03289 WPForms Pro < 1.7.7 - CSV Injection CVSS 3.1CRITICAL 9.8
  • TI-2024-10443 Contact Form & SMTP Plugin for WordPress by PirateForms < 2.6.0 - Admin+ Stored XSS CVSS 3.1MEDIUM 6.1
  • TI-2024-10442 Contact Form & SMTP Plugin for WordPress by PirateForms < 2.6.0 - Admin+ Stored XSS CVSS 3.1MEDIUM 6.1
  • TI-2020-19054 WPForms 1.7.8 - Cross-Site Scripting (XSS) CVSS 4.0MEDIUM 5.1
  • TI-2024-10397 WPForms < 1.9.2.3 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.7
  • TI-2019-15248 Contact Form & SMTP Plugin by PirateForms <= 2.5.1 - Unauthenticated HTML injection CVSS 3.1HIGH 7.2
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences