What’s Vulnerable › Vulnerabilities

CVE-2023-6957: Fluent Forms <= 5.1.9 - Authenticated (Contributor+) Stored Cross-Site Scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-13 · updated 2026-06-17
• Weakness: CWE-79

Description

The Fluent Forms plugin for WordPress by Fluent Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 5.1.9 due to insufficient input sanitization and output escaping. This makes it possible for attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploitation level depends on who is granted the right to create forms by an administrator. This level can be as low as contributor, but by default is admin.

Affected products

• techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder: before 5.1.10 — fixed in 5.1.10

How to fix

Upgrade to a fixed version: techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder 5.1.10. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3041316%40fluentform%2Ftrunk&old=3025740%40fluentform%2Ftrunk&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/f4050403-6b8c-4023-b170-39f3cb68583e?source=cve
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3041316%40fluentform%2Ftrunk&old=3025740%40fluentform%2Ftrunk&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/f4050403-6b8c-4023-b170-39f3cb68583e?source=cve

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