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CVE-2021-4367

20
FAUCET Score

CVE-2021-4367 describes a Stored Cross-Site Scripting (XSS) vulnerability in the Flo Forms – Easy Drag & Drop Form Builder plugin for WordPress, affecting versions up to and including 1.0.35. This flaw stems from insufficient input sanitization, output escaping, and missing capability checks, allowing authenticated attackers, even subscribers, to inject malicious web scripts. The vulnerability has a CVSS score of 5.4 (Medium), indicating it can be exploited over the network with low complexity, requiring user interaction, and potentially leading to limited impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0.35CPE matchmatch criteria
cpe:2.3:a:flothemes:flo_forms:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

6.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 81st percentile among its peer group of 15,224 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.nintechnet.com / zero-day-vulnerability-fixed-in-wordpress-flo-forms-plugin
Exploit
wpscan.com / vulnerability/b4a83501-c727-4c9b-a9a1-46b399ab0caa
Third Party Advisory
wordfence.com / threat-intel/vulnerabilities/id/a175e103-ab89-404b-8736-94d0d93d6cf3
Third Party Advisory