Paytium: Mollie payment forms & donations <= 5.0.3 - Unauthenticated Privilege Escalation via 'pt_form_field[pt-user-role]' Parameter
| CVE | CVE-2026-18467 |
|---|---|
| CVSS | 9.8 (Critical) |
| Publicly Published | September 23, 2026 |
| Last Updated | September 24, 2026 |
| Researcher |
Aydan Arabadzha
- NextdoorSEC
|
Description
The Paytium: Mollie payment forms & donations plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 5.0.3. The 5.0.3 patch introduced a wp_hash()/hash_equals() signature gate on the pt-paytium-user-data field, but left a second filter — pt_cf_checkout_meta(), registered on the pt_meta_values hook after the signed builder — that copies every $_POST['pt_form_field'][*] key verbatim into the payment meta array without any signature verification; this allows the pt-user-role value it copies to overwrite the signed path's output, after which paytium_user_data_processing() reads the persisted _pt-user-role post meta and passes it directly as the role argument to wp_insert_user(). This makes it possible for unauthenticated attackers to register a new WordPress account with the administrator role and fully take over the site. Exploitation requires submitting a payment through a publicly-exposed [paytium] shortcode form and completing the resulting payment flow, after which the attacker can seize the new administrator account via the standard lost-password flow on their supplied email address.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Paytium: Mollie payment forms & donations
| Software Type | Plugin |
|---|---|
| Software Slug | paytium (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 5.0.4, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Paytium: Mollie payment forms & donations
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