Fluent Forms <= 5.1.5 - Authenticated(Administrator+) Stored Cross-Site Scripting via imported form title

published 2024-01-27 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-16411

cvss: 4.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits: 0; none known

The Contact Form Plugin – Fastest Contact Form Builder Plugin for WordPress by Fluent Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via imported form titles in all versions up to, and including, 5.1.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, 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.

Patch / fix

links 2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-01-30)

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/0348d465-f351-4c52-b293-8b3b058292b9?source=cve referenced PoC, tagged "exploit" by a source, unverified
advisory.abay.sh https://advisory.abay.sh/cve-2024-0618/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.4	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

wordfence.com /threat-intel/vulnerabilities/id/0348d465-f351-4c52-b293-8b3b058292b9?source=cve
exploit, patch, third-party-advisory
plugins.trac.wordpress.org /changeset/3022938/fluentform/tags/5.1.7/app/Helpers/Helper.php?old=3000676&old_path=fluentform%2Ftags%2F5.1.5
patch
advisory.abay.sh /cve-2024-0618/
exploit, third-party-advisory

Sources

CVE List CVE-2024-0618
NVD CVE-2024-0618

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary