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JetBlocks For Elementor EUVDEUVD-2026-81497

| CVE-2026-66576 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-09-17 Patchstack GHSA-qqp5-p3gw-hh9g
6.5
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
    Obtain Contributor account on WP site
  2. Delivery
    Inject XSS payload via JetBlocks field
  3. Exploit
    Store unsanitized script in content
  4. Execution
    Admin views injected content
  5. Persist
    Script executes in admin browser session
  6. Impact
    Hijack session or perform admin actions

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

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

Exploitation Conditions

Requires an authenticated WordPress account with at least Contributor privileges (PR:L) on a site running JetBlocks For Elementor <= 1.5.2, plus the Elementor page builder that this add-on extends. Exploitation is not automatic: a higher-privileged user (e.g., administrator or editor) must subsequently view the attacker-injected content for the stored script to execute (UI:R). Limiting factors: no anonymous/unauthenticated path, dependence on the site permitting Contributor-role registration or an already-compromised low-privilege account, and the need for victim interaction - which together make mass or drive-by exploitation impractical.

Impact

This is a moderate, low-priority issue in real-world terms. The vendor (Patchstack) CVSS 3.1 score of 6.5 (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) reflects a stored/contributor-level XSS: network reachable and low complexity, but gated by authenticated Contributor privileges (PR:L) and requiring victim interaction (UI:R), typically an administrator or higher-privileged user viewing the injected content. The scope change (S:C) and split Low impacts across C/I/A are the standard Patchstack pattern for reflected/stored XSS that executes in a victim's browser session. No EPSS score, no CISA KEV listing, and no public exploit code are present in the provided data - so exploitation status is 'no public exploit identified at time of analysis.' There is no conflict between the CVSS vector and the description; both indicate authenticated, interaction-dependent web exploitation. The main caveat is that no fixed version is provided, which complicates remediation planning. Overall this is a routine WordPress-plugin XSS requiring an insider or compromised low-privilege account, not an urgent internet-facing threat.

Exploit ScenarioDerived

An attacker who holds (or has phished/registered) a WordPress Contributor account on a site running JetBlocks For Elementor <= 1.5.2 injects a malicious script payload through a plugin input field that is insufficiently sanitized. When an administrator or editor later views the contributed content in wp-admin or on a rendered page, the script executes in their authenticated browser context, enabling session/cookie theft or admin-action forgery. No public proof-of-concept is identified in the provided data.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 17, 2026

Stored cross-site scripting in JetBlocks For Elementor version 1.5.2 and earlier lets an authenticated WordPress user with Contributor-level privileges inject markup that later executes in the browser of a higher-privileged user (administrator or editor) who views the affected content. The flaw carries CVSS 3.1 score 6.5 (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, CWE-79), and exploitation demands both a low-privilege account on the site and subsequent victim interaction, so it is a moderate, low-priority issue in real-world terms rather than a mass or drive-by attack path. Reported by Patchstack and tracked as EUVD-2026-81497; no public exploit identified at time of analysis.

RemediationAI

No vendor-released patch version is identified in the available data; check the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/jet-blocks/vulnerability/wordpress-jetblocks-for-elementor-plugin-1-5-2-cross-site-scripting-xss-vulnerability?_s_id=cve) and JetBlocks/Crocoblock release notes for a fixed build above 1.5.2 and upgrade as soon as it is published. If no fixed version is yet available, disable or deactivate the JetBlocks For Elementor plugin until a patch ships; the trade-off is losing its Elementor widget functionality, which may break existing page layouts that depend on those widgets, so schedule it against site requirements. In parallel, reduce the attack surface by restricting or disabling open Contributor-level registration (Settings > General) and auditing existing Contributor accounts, since the vector requires an authenticated low-privilege author - this can disrupt legitimate guest-author workflows. Remove unnecessary unfiltered-HTML or custom-markup capabilities from Contributor and Author roles via a capability-management plugin, and consider restricting who may create or approve content that renders through the plugin's widgets; these changes tighten editorial workflows and may slow publishing. Because exploitation requires a privileged user to open the poisoned content, avoid having administrators browse untrusted pending drafts or previews, and monitor the site's user roster and post revisions for unexpected script content as a detection measure. Applying a WordPress-level content sanitization or web application firewall rule against script tags in contributor submissions can serve as a temporary compensating control, though it may strip legitimate embedded markup.

Affected VersionsENISA

JetBlocks For Elementor n/a ≤1.5.2

Affected Packages

euvd jetblocks_for_elementor 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

JetBlocks For Elementor is a WordPress add-on plugin from Crocoblock (Jetimpex Inc.) that supplies additional Elementor page-builder widgets, so any affected site runs both WordPress and the Elementor page builder that the plugin extends. The CPE string cpe:2.3:a:crocoblock._jetimpex_inc.:jetblocks_for_elementor:*:*:*:*:*:*:*:* identifies the affected component, and the EUVD record lists all versions up to and including 1.5.2. The root cause is CWE-79 (improper neutralization of input during web page generation), specifically a stored/persistent XSS: user-supplied content is saved without adequate output escaping or sanitization when rendered through the plugin's widgets or administrative views. The CVSS vector's scope change (S:C) reflects that the injected script executes with the victim's session privileges inside the WordPress context rather than staying confined to the attacker's own page, which creates the potential for privileged actions performed on behalf of the victim, session or nonce exposure, or admin-visible content tampering. The PR:L/UI:R components confirm only authenticated low-privilege contribution is needed, but a separate higher-privileged user must view the poisoned content before the payload fires.

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Severity by source

Vendor (Patchstack) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
vuln.today AI 6.5 MEDIUM

Authenticated Contributor role gives PR:L, stored XSS needs a privileged viewer so UI:R, and cross-context script execution yields S:C with limited C/I/A impact.

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

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

DescriptionCVE.org

Contributor Cross Site Scripting (XSS) in JetBlocks For Elementor <= 1.5.2 versions.

Threat Intelligence Overview

EPSS Score
0.2%
Top 94% exploitable
Prevalence
Low
niche Crocoblock Elementor add-on plugin, limited production footprint
Data Quality
4 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 0.2%
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
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
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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