CVE-2021-4367: The Flo Forms – Easy Drag & Drop Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scriptin

Q: How do I fix CVE-2021-4367?

flo forms: upgrade to newer than 1.0.35. Exact commands for each OS are on this page.

Q: Is CVE-2021-4367 being exploited?

CVE-2021-4367 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-4367 affect?

CVE-2021-4367 affects flo forms. Severity is medium (CVSS 6.4). 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 insufficien

Q: How urgent is CVE-2021-4367?

Priority 40/100. Public exploit reference

This month

MEDIUM 6.4UPGRADE

CVE-2021-4367 is a medium-severity flaw (CVSS 6.4) affecting flo forms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 wh

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-06-07
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: flothemes

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-06-07 02:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

flothemes flo forms UPGRADE

Affected: <= 1.0.35

Fixed in: newer than 1.0.35

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flo-forms || rpm -q flo-forms || flo-forms --version

2. UPGRADE to newer than 1.0.35 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flo-forms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flo-forms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4367?

flo forms: upgrade to newer than 1.0.35. Exact commands for each OS are on this page.

Is CVE-2021-4367 being exploited?

CVE-2021-4367 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4367 affect?

CVE-2021-4367 affects flo forms. Severity is medium (CVSS 6.4). 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 insufficien

How urgent is CVE-2021-4367?

Priority 40/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2023-35095 MEDIUM 5.9 UPGRADE Auth

References

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