XSS in Strategy11 Formidable Form Builder
CVE-2021-24608
The Formidable Form Builder – Contact Form, Survey & Quiz Forms Plugin for WordPress plugin before 5.0.07 does not sanitise and escape its Form's Labels, allowing high privileged users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Strategy11 Formidable Form Builder
- Formidable Form Builder – Contact Form, Survey & Quiz Forms Plugin For WordPress — versions 5.0.07
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/75305ea8-730b-4caf-a3c6-cb94adee683c (Exploit, Third Party Advisory)
- plugins.trac.wordpress.org/changeset/2609911 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24608?
- CVE-2021-24608 is a medium-severity vulnerability in Strategy11 Formidable Form Builder, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-10-25.
- How severe is CVE-2021-24608?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2021-24608 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.