What is CVE-2024-6520?

CVE-2024-6520 is a medium-severity vulnerability in Fluentforms Contact Form, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2024-07-27.

How severe is CVE-2024-6520?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Is CVE-2024-6520 known to be exploited?

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

XSS in Fluentforms Contact Form

CVE-2024-6520

The Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom error message in all versions up to, and including, 5.1.19 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (24.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

security@wordfence.com (Third Party Advisory)
security@wordfence.com (Release Notes)
security@wordfence.com (Patch)

Frequently asked questions

What is CVE-2024-6520?: CVE-2024-6520 is a medium-severity vulnerability in Fluentforms Contact Form, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2024-07-27.
How severe is CVE-2024-6520?: Medium severity. CVSS v3 base score is 4.4 out of 10.
Is CVE-2024-6520 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.