highCVE-2026-15155

Essential Addons for Elementor <= 6.6.10 - Authenticated (Contributor+) Account Takeover via Email Header Injection

Q: What is affected by CVE-2026-15155?

Essential Addons for Elementor – Popular Elementor Templates & Widgets versions listed as affected should be reviewed: *-6.6.10.

Q: What should I fix first?

Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.

Q: How do I confirm the fix worked?

Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.

Q: How are Fixnx security risk categories chosen?

Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.

The Essential Addons for Elementor – Popular Elementor Templates & Widgets plugin for WordPress is vulnerable to Authenticated Account Takeover via Email Header Injection in all versions up to, and including, 6.6.10 This is due to insufficient server-side validation of a Login/Register widget setting used to construct outgoing email headers — the allowed-values restriction is enforced only in the client-side editor UI and not on the server, and the applied sanitization does not strip or encode CR/LF characters, allowing CRLF sequences stored in that setting to survive into raw mail headers. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject an additional Bcc header into the WordPress administrator's password-reset notification email, receive a copy of a valid administrator password-reset link, and achieve full administrator account takeover.

ProductEssential Addons for Elementor – Popular Elementor Templates & Widgets

CVSS8.8

EPSS0.00367

UpdatedJuly 13, 2026

Quick answer

Essential Addons for Elementor – Popular Elementor Templates & Widgets should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.

Who is affected

Affected versions

*-6.6.10

Fixed versions

6.6.11

How to fix it

Essential Addons for Elementor – Popular Elementor Templates & Widgets is affected by CVE-2026-15155, a WordPress plugin vulnerability issue in versions up to 6.6.10. Wordfence lists the official remediation as updating to version 6.6.11, or a newer patched version. Prioritize internet-facing WordPress sites, sites with public registration, customer portals, Elementor/page-builder surfaces, and admin workflows where the vulnerable feature is enabled. If immediate patching is not possible, disable the affected plugin or feature, restrict access, and monitor for exploitation until the update is installed.

Inventory every WordPress site that has Essential Addons for Elementor – Popular Elementor Templates & Widgets installed, including production, staging, multisite, client, and WooCommerce environments.
Confirm the installed Essential Addons for Elementor – Popular Elementor Templates & Widgets version and compare it with the affected range from the Wordfence advisory.
Update Essential Addons for Elementor – Popular Elementor Templates & Widgets to version 6.6.11, or to a newer vendor-supported patched version from the official WordPress update channel.
If the update cannot be applied immediately, disable Essential Addons for Elementor – Popular Elementor Templates & Widgets or the affected feature and restrict access with roles, authentication, WAF rules, or temporary route blocking.
Review plugin data, recent administrative actions, logs, and affected workflows for suspicious changes or abuse attempts.
Rotate administrator sessions, API keys, webhook secrets, payment or integration tokens, and affected credentials if logs or content review suggest compromise.
Clear WordPress, object, CDN, page-builder, security plugin, and browser caches after patching so vulnerable assets or stored payloads are not served.

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Verify the fix

Confirm the running Essential Addons for Elementor – Popular Elementor Templates & Widgets version is version 6.6.11 or newer, and record the patched version in the remediation ticket.
Verify the vulnerable workflow no longer reproduces after the update or mitigation.
Review web server, WordPress, security plugin, WAF, database, and application logs for exploitation attempts before and after the fix.
Retest normal visitor, subscriber, customer, editor, administrator, checkout, form, API, booking, or integration workflows to confirm expected behavior still works.
Run a fresh Fixnx scan and document the public exposure state, patched version, log review, and any cleanup evidence.

Related categories

WordPress

Trusted references

Wordfence advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Source advisoryWordfence, NVD Wordfence advisoryWordfence, NVD

FAQ

What is affected by CVE-2026-15155?

Essential Addons for Elementor – Popular Elementor Templates & Widgets versions listed as affected should be reviewed: *-6.6.10.

What should I fix first?

Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.

How do I confirm the fix worked?

Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.

How are Fixnx security risk categories chosen?

Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.