CVE-2026-2918 Cross-site scripting in Happy Addons for Elementor
Authenticated attackers can inject malicious scripts into template conditions, leading to stored XSS and potential privilege escalation when administrators view the panel.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2918?
CVE-2026-2918 is a medium-severity cross-site scripting vulnerability in thehappymonster Happy Addons for Elementor, published on 11 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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_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.
Weakness: CWE-639
Which versions are affected by CVE-2026-2918?
How do I fix CVE-2026-2918?
No fix has been published for CVE-2026-2918 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-2918 being exploited?
There is no known exploitation of CVE-2026-2918 in the wild and no public exploit code.
Sources
Also known as GHSA-9vxv-jfqw-372j.