CVE-2026-18467 json
Paytium: Mollie payment forms & donations <= 5.0.3 - Unauthenticated Privilege Escalation via 'pt_form_field[pt-user-role]' Parameter
published 2026-09-24 46 d ago modified 2026-09-24 46 d ago also EUVD-2026-85777
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 46 d ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- paytiumsupport Paytium: Mollie payment forms & donations
Classification
- Weakness
-
- CWE-269 Improper Privilege Management
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/caa1a42a-6bb2-42c8-aae7-fb1c895573a8?source=cve
- plugins.trac.wordpress.org /browser/paytium/tags/5.0.3/includes/user-data-functions.php#L214
- plugins.trac.wordpress.org /browser/paytium/tags/5.0.3/includes/process-payment-functions.php#L1103
- plugins.trac.wordpress.org /browser/paytium/tags/5.0.3/includes/process-payment-functions.php#L696
- plugins.trac.wordpress.org /browser/paytium/tags/5.0.3/includes/process-payment-functions.php#L21
- plugins.trac.wordpress.org /browser/paytium/tags/5.0.3/includes/payment-functions.php#L113
- plugins.trac.wordpress.org /changeset/3678569/paytium
Sources
- CVE List CVE-2026-18467
- NVD CVE-2026-18467
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.