Paytium: Mollie payment forms & donations <= 5.0.3 - Unauthenticated Privilege Escalation via 'pt_form_field[pt-user-role]' Parameter
Summary
| CVE | CVE-2026-18467 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-24 02:16:52 UTC |
| Updated | 2026-09-24 16:17:07 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.003920000 probability, percentile 0.305460000 (date 2026-09-24)
Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Paytiumsupport | Paytium Mollie Payment Forms Donations | affected 5.0.3 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/process-payment-functions... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/user-data-functions.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/payment-functions.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/process-payment-functions... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset/3678569/paytium | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/caa1a42a-6bb2-42c8-aae7-fb1c8... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/process-payment-functions... | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Aydan Arabadzha (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-09-23T13:14:06.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.