CVE-2026-107866: JetElements For Elementor Stored XSS Flaw

CVE-2026-107866 Overview

CVE-2026-107866 is a stored cross-site scripting (XSS) vulnerability in the Crocoblock JetElements For Elementor WordPress plugin. The flaw affects all versions of jet-elements up to and including 2.9.2.3. An authenticated contributor-level user can inject malicious JavaScript that persists in the page and executes in the browser of any visitor who views the affected content. The issue is tracked under [CWE-79] (Improper Neutralization of Input During Web Page Generation).

Critical Impact
Stored script payloads execute in victim browsers, enabling session theft, redirection, and administrator-targeted actions on sites running the vulnerable plugin.

Affected Products

Crocoblock JetElements For Elementor plugin (jet-elements)
All versions from initial release through 2.9.2.3
WordPress sites using Elementor with the JetElements add-on

Discovery Timeline

2026-10-12 - CVE-2026-107866 published to NVD
2026-10-13 - Last updated in NVD database

Technical Details for CVE-2026-107866

Vulnerability Analysis

The vulnerability is a stored XSS flaw in the JetElements For Elementor plugin, a widget pack extending the Elementor page builder. Attacker-supplied input is written to the page without sufficient output encoding or sanitization. Because the payload is stored in the WordPress database and rendered on page load, every visitor who views the affected post or page executes the injected script.

Exploitation requires low-privileged authentication and user interaction, and the scope is changed because scripts execute in the context of other users' browsers, including administrators. Successful exploitation can lead to account takeover, cookie theft, defacement, or pivoting to additional WordPress administrative actions via forged requests.

Root Cause

The root cause is missing or inadequate neutralization of HTML and JavaScript metacharacters in widget attributes handled by the plugin. Input accepted through Elementor widget fields is persisted and later echoed into the rendered HTML without being passed through WordPress sanitization helpers such as wp_kses_post or esc_attr on output.

Attack Vector

The attack vector is network-based. An authenticated user with Elementor editing rights crafts a widget containing a script payload inside a vulnerable attribute. The payload is saved to the database and executes when any visitor loads the affected page. Refer to the Patchstack JetElements XSS Vulnerability advisory for the published technical reference.

Detection Methods for CVE-2026-107866

Indicators of Compromise

Elementor widget data (_elementor_data post meta) containing <script> tags, javascript: URIs, or on* event handler attributes.
Unexpected outbound requests from site visitors to attacker-controlled domains originating from rendered pages.
New or modified WordPress administrator accounts following contributor activity on pages using JetElements widgets.

Detection Strategies

Audit the wp_postmeta table for Elementor payloads containing script tags or event handler attributes within JetElements widget blocks.
Scan rendered HTML output for inline JavaScript inside widget-generated containers that should contain only text or safe HTML.
Review WordPress audit logs for contributor or author accounts editing pages using JetElements widgets around the disclosure window.

Monitoring Recommendations

Enable a web application firewall with signatures for stored XSS payloads targeting WordPress plugin inputs.
Monitor Content Security Policy (CSP) violation reports for unexpected inline script execution on public pages.
Alert on privilege changes and new administrator creation events in WordPress to detect post-exploitation activity.

How to Mitigate CVE-2026-107866

Immediate Actions Required

Update the JetElements For Elementor plugin to a version later than 2.9.2.3 as soon as the vendor publishes a fixed release.
Review and restrict contributor, author, and editor accounts that have access to Elementor widget editing.
Inspect existing JetElements widgets for injected script content and purge any malicious payloads from post meta.

Patch Information

The NVD record indicates the vulnerability affects JetElements For Elementor from unspecified initial versions through 2.9.2.3. Administrators should consult the Patchstack advisory and the Crocoblock changelog for the fixed version number and apply the update through the WordPress plugin updater.

Workarounds

Disable the JetElements For Elementor plugin until a patched version is installed if widgets are not business-critical.
Enforce a strict Content Security Policy that disallows inline scripts to limit payload execution.
Reduce the number of accounts with Elementor editing permissions and require strong authentication for those roles.

bash

# Configuration example: deploy via wp-cli once a fixed release is available
wp plugin update jet-elements
wp plugin list --name=jet-elements --fields=name,status,version