TI-2021-03224 Aliases CVE-2021-4367 GHSA-vxfg-h569-q838

Flo Forms – Easy Drag & Drop Form Builder <= 1.0.35 - Options Change to Stored Cross-Site Scripting

LOW 30CWE-79Published 2023-06-07 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Flo Forms – Easy Drag & Drop Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Options Change by using the flo_import_forms_options AJAX action in versions up to, and including, 1.0.35 due to insufficient input sanitization and output escaping along with missing capability checks. This makes it possible for authenticated attackers, like subscribers, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0067 52nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

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: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
flothemesplugins	Flo Forms – Easy Drag & Drop Form Builder	up to 1.0.35	—	No fix listed	CNA

Flo Forms – Easy Drag & Drop Form Builder Vendorflothemesplugins Affected up to 1.0.35 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:flothemes:flo_forms::::::wordpress::*	up to 1.0.35	Vulnerable	Flothemes

cpe:2.3:a:flothemes:flo_forms:*:*:*:*:*:wordpress:*:* Versions up to 1.0.35 Vulnerable ·Flothemes

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-4367
2026-10-03 Alias added: GHSA-vxfg-h569-q838

References

Exploit 1

https://blog.nintechnet.com/zero-day-vulnerability-fixed-in-wordpress-flo-forms-plugin/

Advisory 2

TI-2025-12030 Flo Forms – Easy Drag & Drop Form Builder <= 1.0.43 - Unauthenticated Stored Cross-Site Scripting via SVG Upload CVSS 3.1HIGH 7.1
TI-2025-23310 WordPress Flo Forms plugin <= 1.0.43 - Broken Access Control vulnerability CVSS 3.1MEDIUM 6.5
TI-2023-25829 WordPress Flo Forms plugin <= 1.0.41 - Broken Access Control vulnerability CVSS 3.1MEDIUM 4.3

Sources

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