CVE-2017-20192 — The Formidable Form Builder plugin for WordPress is vulnerable to Stored Cross-S

The Formidable Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters submitted during form entries like 'after_html' in versions before 2.05.03 due to insufficient input sanitization and output escaping. This makes it pos

01What is this vulnerability?

The Formidable Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters submitted during form entries like 'after_html' in versions before 2.05.03 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in a victim's browser.

02Affected products

Vendor	Product	Versions
strategy11team	Formidable Forms	Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder — *

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-10-16T06:43:36.437Z
• Last modified: 2024-10-16T18:03:37.388Z

09References

• www.wordfence.com — https://www.wordfence.com/threat-intel/vulnerabilities/id/900fcaab-2424-4ae8-af1…
• klikki.fi — https://klikki.fi/adv/formidable.html
• wordpress.org — https://wordpress.org/plugins/formidable/#developers