# Download Manager <= 3.3.74 - Unauthenticated Stored Cross-Site Scripting via Registration Name Fields

- **ID:** WPSEC-2026-2299
- **Plugin:** Download Manager (`download-manager`), https://wordpress.org/plugins/download-manager/
- **Affected versions:** from 3.3.45 before 3.3.75
- **Fixed in:** 3.3.75 (Update to 3.3.75 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin High, affected versions High (as of 2026-11-03)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/download-manager
- **Fix released:** 2026-11-01
- **Published:** 2026-11-03
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2299/

## Description

The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the registration name fields in versions 3.3.45 up to, and including, 3.3.74, due to the signup handler passing the WP_Error returned by a refused wp_create_user() call (for example for a username longer than 60 characters) to wp_update_user() as the user ID, which updates user 1, combined with insufficient output escaping of the package author's display name, which is placed inside the alt attribute of the Spotlight link template. This makes it possible for unauthenticated attackers, when user registration is enabled, to set the first administrator's name to a value that injects arbitrary web scripts that execute whenever a user views a package by that administrator rendered with the Spotlight template.

## References

- https://wpsec.com/vuln/WPSEC-2026-2299/
- https://plugins.svn.wordpress.org/download-manager/tags/3.3.75/
- https://wordpress.org/plugins/download-manager/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2299/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.