CVE-2026-18467
CriticalCVSS 9.8Summary
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 added a signature gate on the pt-paytium-user-data field but left a second filter, pt_cf_checkout_meta(), that copies $_POST['pt_form_field'] values without signature verification, allowing the user role to be overwritten and an administrator account to be created.
Risk Assessment
An unauthenticated attacker can register an account with the administrator role and fully take over the WordPress site, posing a critical risk to the confidentiality and integrity of the service.
Recommendation
Update the Paytium plugin to a version later than 5.0.3, or if that is not possible, immediately disable the plugin or remove publicly exposed [paytium] shortcode forms.
Related vulnerabilities
- CVE-2026-96891Critical
A vulnerability was identified in D-Link DIR-825 3.00b32 in the tunnel_set_params function of tunnel.c in the rp-l2tp component. Manipulation of the peer_hostname argument leads to an out-of-bounds write. The attack may be initiated remotely.
- CVE-2026-93577Critical
GitLab CE/EE versions from 19.2 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 contain an integer overflow issue when compiling a specially crafted regular expression in a CI/CD configuration. Under certain conditions an authenticated user could execute arbitrary code on the GitLab server.
- CVE-2026-89078Critical
GitLab CE/EE versions from 19.2 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 contain a double free issue when parsing a specially crafted regular expression in a CI/CD configuration. Under certain conditions an authenticated user could execute arbitrary code on the GitLab server.
- CVE-2026-93352Critical
Laravel-Mediable versions 7.0.0 to 7.0.2 contain an incomplete patch for CVE-2026-49972 — the .pht extension is missing from the forbidden_extensions blocklist in config/mediable.php. Apache on Debian and Ubuntu executes .pht files as PHP, allowing an attacker to upload a malicious file and achieve remote code execution.
- CVE-2026-6928Critical
IBM Concert versions 1.0.0 through 3.0.0 references or accesses memory after it has been freed (use-after-free). An attacker who can influence program execution or input may exploit this condition to corrupt memory, cause application crashes, or execute arbitrary code.
- CVE-2026-6730Critical
IBM Concert versions 1.0.0 through 3.0.0 is vulnerable to a buffer overflow caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.
- CVE-2026-6721Critical
IBM Concert versions 1.0.0 through 3.0.0 allows an unauthenticated remote attacker to supply specially crafted input that is incorporated into OS commands, resulting in arbitrary command execution. Successful exploitation allows remote code execution with the privileges of the affected application.
- CVE-2026-67404Critical
RabbitMQ prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0 — when no CA bundle is available, ssl_options/1 falls back to [{verify, verify_none}] with no warning. An attacker in a man-in-the-middle position can forge the JWKS response, leading the broker to accept arbitrary JWTs.
- CVE-2026-67231Critical
RabbitMQ prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0 — the trust-store plugin installs a verify_fun that overrides {bad_cert, unknown_ca} / {bad_cert, selfsigned_peer} when the presented cert "matches" a whitelisted one. The match key relies solely on issuer name and serial number, which can be easily forged, allowing TLS client authentication bypass.
- CVE-2026-87900Critical
WP Toolkit for cPanel versions 6.11.2-10794 and earlier contains an argument injection vulnerability that allows remote authenticated users to read arbitrary files and execute arbitrary code across customer accounts.
Original NVD description (English source)
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.