Security readout for executives and security teams
Plain-English summary
Older Formidable Forms WordPress sites could let an unauthenticated visitor store malicious browser script through form submissions. That script may run later when someone views affected content, creating risk to site users, administrators, and trust in the site.
Executive priority
Prioritize remediation for public WordPress sites using this plugin. The issue is high severity because attackers need no login and the impact can cross user trust boundaries, though active exploitation is not confirmed in the provided sources.
Technical view
CVE-2017-20192 is stored XSS in Formidable Form Builder/Formidable Forms before 2.05.03. Multiple submitted entry parameters, including examples such as after_html, were insufficiently sanitized and escaped. The CVSS 3.1 score is 8.3, with network access, low complexity, no privileges, and changed scope.
Likely exposure
Exposure is likely limited to WordPress installations running Formidable Form Builder/Formidable Forms versions before 2.05.03, especially where unauthenticated users can submit form entries that are later rendered or reviewed.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The weakness is remotely reachable and unauthenticated, but exploitation status should be treated as unconfirmed based on the provided evidence.
Researcher notes
Evidence identifies stored XSS through form-entry parameters before 2.05.03. The affected-product metadata is sparse and lists version data inconsistently, so validate exposure against installed plugin versions and vendor release history rather than CPE matching alone.
Mitigation direction
- Upgrade Formidable Forms to version 2.05.03 or later.
- Check current vendor guidance and changelog before remediation.
- Disable public form submissions until vulnerable sites are updated.
- Review and clean stored form entries if suspicious scripts are found.
Validation and detection
- Inventory WordPress sites using Formidable Forms or Formidable Form Builder.
- Confirm installed plugin versions are 2.05.03 or later.
- Identify public forms accepting unauthenticated submissions.
- Review stored entries for unexpected script-like content.
- Confirm no vulnerable entry output remains after cleanup.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2017-20192 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L3.93.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.3HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.