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CVE-2026-2917: Happy Addons for Elementor <= 3.21.0 - Insecure Direct Object Reference to Authenticated (Contributor+) Post Duplication via 'post_id' Parameter

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-11 · updated 2026-06-17
• Weakness: CWE-639

Description

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_duplicate_thing` admin action handler. This is due to the `can_clone()` method only checking `current_user_can('edit_posts')` (a general capability) without performing object-level authorization such as `current_user_can('edit_post', $post_id)`, and the nonce being tied to the generic action name `ha_duplicate_thing` rather than to a specific post ID. This makes it possible for authenticated attackers, with Contributor-level access and above, to clone any published post, page, or custom post type by obtaining a valid clone nonce from their own posts and changing the `post_id` parameter to target other users' content. The clone operation copies the full post content, all post metadata (including potentially sensitive widget configurations and API tokens), and taxonomies into a new draft owned by the attacker.

Affected products

• thehappymonster Happy Addons for Elementor: through 3.21.0

References

• https://plugins.trac.wordpress.org/browser/happy-elementor-addons/tags/3.20.7/classes/clone-handler.php#L21
• https://plugins.trac.wordpress.org/browser/happy-elementor-addons/tags/3.20.7/classes/clone-handler.php#L61
• https://plugins.trac.wordpress.org/browser/happy-elementor-addons/trunk/classes/clone-handler.php#L21
• https://plugins.trac.wordpress.org/browser/happy-elementor-addons/trunk/classes/clone-handler.php#L61
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3475242%40happy-elementor-addons%2Ftrunk&old=3463375%40happy-elementor-addons%2Ftrunk&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9234b1ce-032f-487d-b60a-f80c78373238?source=cve

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