Description
The ShortPixel Image Optimizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the attachment post_title in all versions up to, and including, 6.4.3. This is due to insufficient output escaping in the getEditorPopup() function and its corresponding media-popup.php template. Specifically, the attachment's post_title is retrieved from the database via get_post() in AjaxController.php (line 435) and passed directly to the view template (line 449), where it is rendered into an HTML input element's value attribute without esc_attr() escaping (media-popup.php line 139). Since WordPress allows Authors to set arbitrary attachment titles (including double-quote characters) via the REST API, a malicious author can craft an attachment title that breaks out of the HTML attribute and injects arbitrary JavaScript event handlers. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts that execute whenever a higher-privileged user (such as an administrator) opens the ShortPixel AI editor popup (Background Removal or Image Upscale) for the poisoned attachment.
INFO
Published Date :
2026-03-26T02:25:20.157Z
Last Modified :
2026-04-08T17:12:25.085Z
Source :
Wordfence
AFFECTED PRODUCTS
The following products are affected by CVE-2026-4335 vulnerability.
| Vendors | Products |
|---|---|
| Shortpixel |
|
| Wordpress |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4335.
