Description
The Users manager – PN plugin for WordPress is vulnerable to Privilege Escalation via Arbitrary User Meta Update in all versions up to and including 1.1.15. This is due to a flawed authorization logic check in the userspn_ajax_nopriv_server() function within the 'userspn_form_save' case. The conditional only blocks unauthenticated users when the user_id is empty, but when a non-empty user_id is supplied, execution bypasses this check entirely and proceeds to update arbitrary user meta via update_user_meta() without any authentication or authorization verification. Additionally, the nonce required for this AJAX endpoint ('userspn-nonce') is exposed to all visitors via wp_localize_script on the public wp_enqueue_scripts hook, rendering the nonce check ineffective as a security control. This makes it possible for unauthenticated attackers to update arbitrary user metadata for any user account, including the userspn_secret_token field.
INFO
Published Date :
2026-04-08T03:36:08.200Z
Last Modified :
2026-04-08T16:42:58.430Z
Source :
Wordfence
AFFECTED PRODUCTS
The following products are affected by CVE-2026-4003 vulnerability.
| Vendors | Products |
|---|---|
| Felixmartinez |
|
| Wordpress |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4003.
