# CVE-2026-120550: WP User Manager stored cross-site scripting in display name

Source: https://junglewise.ai/threats/cve-2026-120550-the-wp-user-manager-registration-form-login-form-user-profile  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-120550 · Severity: medium · CVSS 6.4 · Published 2026-11-06

WP User Manager is a WordPress plugin that creates user registration, login, and profile management forms. Attackers with subscriber-level access can inject malicious scripts into user display names via WordPress's REST API, which then execute for other users viewing affected pages. This could be exploited to steal session cookies, perform actions on behalf of users, or redirect visitors to malicious sites.

Technologies: [WP User Manager](https://junglewise.ai/threats/technologies/wp-user-manager). Vendors: [WP User Manager](https://junglewise.ai/threats/vendors/wp-user-manager).

## Quick answers

**Is CVE-2026-120550 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120550 being exploited in the wild.

**How severe is CVE-2026-120550?** Medium severity, with a CVSS score of 6.4, published 6 November 2026.

**Which products and versions are affected?** WP User Manager up to and including 2.10.2.

**Is there a fix for CVE-2026-120550?** Yes: fixed in 2.10.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-120550 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-120550?** Check whether you run WP User Manager at an affected version. 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.

## How to fix

- Fixed in 2.10.3

## Technical details

The plugin fails to properly sanitize or escape the display_name parameter when updated through the WordPress core REST endpoint POST /wp-json/wp/v2/users/me, bypassing the plugin's own wpum_sanitize_text input sanitizer that is applied only to the front-end account form. An authenticated attacker with subscriber-level or higher privileges can inject arbitrary JavaScript that persists in the database and executes in the browsers of users viewing pages containing that display name.

## Affected products

- wp-user-manager WP User Manager up to and including 2.10.2

## Timeline

- 2026-11-06: disclosed

## References

- [https://downloads.wordpress.org/plugin/wp-user-manager.2.10.3.zip](https://downloads.wordpress.org/plugin/wp-user-manager.2.10.3.zip)
- [https://plugins.trac.wordpress.org/browser/wp-user-manager/tags/2.10.2/includes/fields/class-wpum-field.php](https://plugins.trac.wordpress.org/browser/wp-user-manager/tags/2.10.2/includes/fields/class-wpum-field.php)

## Related threats

- [WP User Manager broken access control vulnerability](https://junglewise.ai/threats/cve-2026-124413-missing-authorization-vulnerability-in-wp-user-manager-wp-user)
- [WP User Manager broken access control in user permissions](https://junglewise.ai/threats/cve-2026-116846-missing-authorization-vulnerability-in-wp-user-manager-wp-user)
- [WP User Manager broken access control in user state](https://junglewise.ai/threats/cve-2026-112823-missing-authorization-vulnerability-in-wp-user-manager-wp-user)
- [WP User Manager payment bypass in account creation](https://junglewise.ai/threats/cve-2026-110527-the-wp-user-manager-wordpress-plugin-before-2-9-20-does-not-roll)
- [WP User Manager broken access control](https://junglewise.ai/threats/cve-2026-108496-missing-authorization-vulnerability-in-wp-user-manager-wp-user)