CVE-2017-20192: strategy11 formidable_form_builder Cross-site Scripting
Vulnerability summary
CVE-2017-20192 is a high (CVSS 8.3) Cross-site Scripting vulnerability in strategy11 formidable_form_builder. EPSS estimates a 1.09% chance of exploitation in the next 30 days, higher than 64.8% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 16-10-2024PublishedVulnerability first disclosed.
- 08-04-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NDiffers
- wordfenceSource8.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
EPSS trend
Probability
1.09%
Chance of exploitation in the next 30 days
Percentile
65%
Versus all other CVEs
30-day change
+0.06 pp
From 1.03% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (klikki.fi)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Strategy111 product
- formidable_form_builder< 2.05.03
Strategy11team1 product
Wordpress1 product
- formidable< 2.05.03
3 vendors · 3 products