# 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.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Mar 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-9vxv-jfqw-372j

## 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 (Authorization Bypass Through User-Controlled Key)

## 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.

## Is CVE-2026-2918 being exploited?

There is no known exploitation of CVE-2026-2918 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2918 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-2918 in the wild and no public exploit code.

Affected product: thehappymonster Happy Addons for Elementor. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-2918/ (Markdown: https://insights.sbomify.com/CVE-2026-2918/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2918
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2918
- OSV: https://osv.dev/vulnerability/CVE-2026-2918

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2918/
Summaries are generated and may contain mistakes; the official description above is the record.