# CVE-2026-89330: EmbedPress PDF Embedder reflected XSS via unique parameter

Source: https://junglewise.ai/threats/cve-2026-89330-embedpress-pdf-embedder-reflected-xss-via-unique-parameter  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-89330 · Severity: medium · CVSS 6.1 · Published 2026-09-18

The EmbedPress plugin for WordPress allows unauthenticated attackers to inject malicious scripts into web pages through a parameter in the URL. If a user clicks a crafted link, the attacker's script executes in the user's browser with their privileges, potentially stealing session tokens, redirecting to phishing pages, or defacing content.

## Quick answers

**Is CVE-2026-89330 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-89330 being exploited in the wild.

**How severe is CVE-2026-89330?** Medium severity, with a CVSS score of 6.1, published 18 September 2026.

**Which products and versions are affected?** EmbedPress PDF Embedder up to and including 4.6.5.

**Is there a fix for CVE-2026-89330?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-89330 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-89330?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The plugin contains a reflected Cross-Site Scripting (XSS) vulnerability in the 'unique' parameter due to insufficient input sanitization and output escaping. The vulnerability was introduced in version 4.3.0 during a refactor that removed the esc_url() function that had previously remediated an equivalent issue (CVE-2023-5749). An unauthenticated attacker can craft a malicious URL with JavaScript in the 'unique' parameter, and if a user clicks the link, the script executes in their browser context. No authentication is required, and the attack vector is network-based, requiring only user interaction. A patch is expected to restore proper output escaping.

## Affected products

- EmbedPress PDF Embedder up to and including 4.6.5

## Timeline

- 2026-09-18: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/embedpress/tags/4.6.5/EmbedPress/Includes/Classes/Feature_Enhancer.php](https://plugins.trac.wordpress.org/browser/embedpress/tags/4.6.5/EmbedPress/Includes/Classes/Feature_Enhancer.php)
- [https://plugins.trac.wordpress.org/browser/embedpress/tags/4.6.5/EmbedPress/Includes/Classes/Feature_Enhancer.php](https://plugins.trac.wordpress.org/browser/embedpress/tags/4.6.5/EmbedPress/Includes/Classes/Feature_Enhancer.php)