8.3

CVE-2017-20192: strategy11 formidable_form_builder Cross-site Scripting

CVSS: 8.3v3.1HighAnalyzed
Published 16-10-2024Last modified 08-04-2026

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.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.3/10
010
High · v3.1 (CVE.org)
EPSS score
1.09%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 16-10-2024
    PublishedVulnerability first disclosed.
  2. 08-04-2026
    Last 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

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

20-09-202620-10-2026
EPSS score
1.09%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (klikki.fi)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Strategy111 product
Strategy11team1 product
Wordpress1 product
  • formidable< 2.05.03

3 vendors · 3 products

References

4 links