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      <title>CVE-2026-18467 — Paytium: Mollie payment forms &amp; donations &lt;= 5.0.3 - Unauthenticated Privilege Escalation via 'pt_form_field[pt-user-ro…</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-18467</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; paytiumsupport Paytium: Mollie payment forms &amp;amp; donations&lt;/p&gt;
&lt;p&gt;The Paytium: Mollie payment forms &amp;amp; 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[&amp;#39;pt_form_field&amp;#39;][*] 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&amp;#39;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; paytiumsupport Paytium: Mollie payment forms &amp;amp; donations&lt;/p&gt;
&lt;p&gt;The Paytium: Mollie payment forms &amp;amp; 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[&amp;#39;pt_form_field&amp;#39;][*] 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&amp;#39;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.&lt;/p&gt;</content:encoded>
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