CVE-2026-19859: CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in JetFormBuilder
Description
The JetFormBuilder WordPress plugin before 3.6.5.2 does not sanitize a request parameter before rendering it as message content, allowing unauthenticated users to execute arbitrary shortcodes registered on the site on any page displaying a form. Escaping is applied to that content before a later shortcode-expansion pass rather than after it, so the escaping can be bypassed.
CVSS v3.1
Score 6.5medium
Affected software
JetFormBuilder
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The JetFormBuilder WordPress plugin prior to version 3.6.5.2 does not properly sanitize a request parameter before rendering it as message content. This improper neutralization of special elements allows unauthenticated users to execute arbitrary shortcodes registered on the site on any page displaying a form. The escaping is applied before the shortcode expansion pass, which can be bypassed, enabling injection of unintended content or code execution within the context of shortcode processing.
Potential Impact
An attacker can inject and execute arbitrary shortcodes on any page displaying a form using the vulnerable JetFormBuilder plugin. This can lead to unauthorized content injection and potentially limited impact on confidentiality and integrity of the affected site. There is no indication of availability impact. The vulnerability is exploitable remotely without authentication.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should monitor vendor communications for updates and consider restricting access or disabling affected functionality if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-14T10:00:54.150Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9d346bacd9273b498d31c0
Added to database: 09/06/2026, 09:37:47 UTC
Last enriched: 09/07/2026, 10:08:16 UTC
Last updated: 10/21/2026, 13:20:20 UTC
Views: 86
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