What is CVE-2021-4367?

CVE-2021-4367 is a medium-severity vulnerability in Flothemes Flo Forms, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2023-06-07.

How severe is CVE-2021-4367?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2021-4367 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Flothemes Flo Forms

CVE-2021-4367

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (48.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Flothemes Flo_forms
Flothemesplugins Flo Forms – Easy Drag & Drop Form Builder — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

security@wordfence.com (Third Party Advisory)
security@wordfence.com (Exploit)
security@wordfence.com (Third Party Advisory)

Frequently asked questions

What is CVE-2021-4367?: CVE-2021-4367 is a medium-severity vulnerability in Flothemes Flo Forms, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2023-06-07.
How severe is CVE-2021-4367?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2021-4367 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.