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Crocoblock JetFormBuilder CVE-2026-119479

| EUVDEUVD-2026-114095 MEDIUM
Basic XSS (CWE-80)
2026-10-30 Patchstack GHSA-4gwr-56qh-7v28
5.3
CVSS 3.1 · Vendor: Patchstack
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach vulnerable JetFormBuilder form/endpoint
  2. Delivery
    Submit content with script-related HTML tags
  3. Exploit
    Payload stored or reflected unsanitized
  4. Execution
    Victim renders page
  5. Impact
    Script executes in victim browser context

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization HTML tag escaping
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the target site to run Crocoblock JetFormBuilder at or below version 3.6.7.1 and to expose a path where script-related HTML tags submitted through the plugin are stored or reflected without neutralization. The available sources do not name the exact form field, endpoint, or configuration that triggers the injection, nor whether contributor/author-level authentication is needed, so the precise prerequisite cannot be confirmed from the provided data. Realistic limiting factors for XSS of this type: a victim typically must view the injected content for the script to fire (victim interaction), and impact is confined to the browser session of whoever renders the payload. The input vector's claim of no user interaction (UI:N) is inconsistent with typical XSS and should be verified against the Patchstack advisory.

Impact

This is a moderate-severity cross-site scripting / content-injection flaw (CWE-80, Basic XSS) in the JetFormBuilder WordPress plugin, scored CVSS 5.3. The supplied vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) indicates a network-reachable, low-complexity issue, but it is internally questionable for an XSS bug: it claims no user interaction (UI:N), no scope change (S:U), and only a confidentiality impact (C:L) with no integrity impact (I:N), whereas script injection typically requires a victim to render the payload (UI:R), crosses a security boundary into the victim's browser (S:C), and primarily harms integrity (I:L). Treat the input vector as approximate. No EPSS probability was provided, the CVE is not in CISA KEV, and no working exploit was supplied - only a Patchstack advisory reference, so there is no public exploit identified at time of analysis. The vuln.today decision label is 'this_month', consistent with a real but non-emergency issue: a widely used plugin with a disclosed XSS, but no evidence of active exploitation or mass automation. Net: a genuine patch-this-month item for WordPress operators running JetFormBuilder, not a drop-everything emergency.

Exploit ScenarioDerived

An attacker injects script-bearing content through JetFormBuilder (for example via a form field or form-rendered content that is not properly neutralized); when a site user or administrator views the affected page or submission, the attacker's script executes in their browser. No working exploit code was provided - only a Patchstack advisory reference - and the exact injection point and trigger are not described in the available sources.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 30, 2026

Cross-site scripting (CWE-80, basic XSS) in Crocoblock JetFormBuilder through 3.6.7.1 allows a remote attacker to inject script-related HTML into plugin-handled form content, which executes in the browser of a user who views the crafted page. The assessed CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N (CVSS 5.3), so victim interaction is required and impact is limited to the browser session; the vendor advisory is a Patchstack entry. No CISA KEV listing or public exploit code is identified in the supplied data; the precise form field or endpoint is not described in the available sources.

RemediationAI

The supplied data does not list a fixed JetFormBuilder version, so no vendor-released patch version can be cited at time of analysis; check the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/jetformbuilder/vulnerability/wordpress-jetformbuilder-plugin-3-6-7-1-content-injection-vulnerability?_s_id=cve) for the current patched release. Until a patch is confirmed, reduce exposure by disabling JetFormBuilder forms or fields that render untrusted submitted content, or by restricting form submission and editing privileges to trusted users; disabling the affected form path can break legitimate workflows, and restricting privileges may disrupt contributor or author workflows. The supplied evidence does not describe additional vendor-specific mitigations or confirm that these compensating controls fully eliminate the issue.

Affected VersionsENISA

JetFormBuilder 0 ≤3.6.7.1

Affected Packages

euvd jetformbuilder no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

JetFormBuilder is a WordPress form-builder plugin; the affected package is identified by CPE cpe:2.3:a:crocoblock:jetformbuilder:*:*:*:*:*:*:*:* through version 3.6.7.1. CWE-80 describes improper neutralization of script-related HTML tags, the basic XSS class where user-supplied markup reaches a rendered page without sufficient encoding or filtering. The independent assessment notes that exploitation requires a path where script-related HTML submitted through the plugin is stored or reflected without neutralization, but the available sources do not name the exact form field, endpoint, or configuration that triggers the injection. The assessed vector is AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, indicating network exploitation with victim interaction and scope change; confidentiality and integrity impact is low and availability impact is none.

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Severity by source

Vendor (Patchstack) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI 6.1 MEDIUM

XSS executes in a victim's browser, so UI:R and S:C with C:L/I:L; PR left at N since a form plugin may accept unauthenticated submissions, though the trigger is not described.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

DescriptionCVE.org

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Crocoblock JetFormBuilder jetformbuilder allows Code Injection.This issue affects JetFormBuilder: from n/a through 3.6.7.1.

Threat Intelligence Overview

EPSS Score
0.3%
Top 76% exploitable
Prevalence
Medium
popular WordPress form-builder plugin, common but not universally deployed
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

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