thehappymonster Happy Addons for Elementor Plugin up to 3.21.0 on WordPress validate_reqeust template_id authorization

Summaryinfo

A vulnerability labeled as critical has been found in thehappymonster Happy Addons for Elementor Plugin up to 3.21.0 on WordPress. Affected is the function validate_reqeust. Such manipulation of the argument template_id leads to authorization. This vulnerability is referenced as CVE-2026-2918. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in thehappymonster Happy Addons for Elementor Plugin up to 3.21.0 on WordPress. It has been rated as critical. Affected by this issue is the function validate_reqeust. The manipulation of the argument template_id with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Happy Addons for Elementor plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.21.0 via the `ha_condition_update` AJAX action. This is due to the `validate_reqeust()` method using `current_user_can('edit_posts', $template_id)` instead of `current_user_can('edit_post', $template_id)` — failing to perform object-level authorization. Additionally, the `ha_get_current_condition` AJAX action lacks a capability check. This makes it possible for authenticated attackers, with Contributor-level access and above, to modify the display conditions of any published `ha_library` template. Because the `cond_to_html()` renderer outputs condition values into HTML attributes without proper escaping (using string concatenation instead of `esc_attr()`), an attacker can inject event handler attributes (e.g., `onmouseover`) that execute JavaScript when an administrator views the Template Conditions panel, resulting in Stored Cross-Site Scripting.

The weakness was published by Dmitrii Ignatyev. The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-2918 since 02/20/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

Upgrading to version 3.20.7 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• thehappymonster

Name

• Happy Addons for Elementor Plugin

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

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