CVE-2026-121970

Pay with Vipps and MobilePay for WooCommerce before 6.4.1 Webhook Signature Forgery

Published Nov 4, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Description
Pay with Vipps and MobilePay for WooCommerce (woo-vipps) before 6.4.1 contains an improper cryptographic signature verification vulnerability in the recurring-payment webhook handler that allows unauthenticated attackers to forge webhook requests when no local webhook secret is stored, because the code fails to return on an empty secret and computes an HMAC keyed with an empty string using a loose == comparison instead of hash_equals. Attackers can craft a recurring.agreement-stopped.v1 event with a known agreementId and a matching empty-key signature to cancel a victim's active WooCommerce subscription.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions pay With Vipps And Mobilepay For Woocommerce
Vendors & Products Wordpress-extensions
Wordpress-extensions pay With Vipps And Mobilepay For Woocommerce
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Pay with Vipps and MobilePay for WooCommerce (woo-vipps) before 6.4.1 contains an improper cryptographic signature verification vulnerability in the recurring-payment webhook handler that allows unauthenticated attackers to forge webhook requests when no local webhook secret is stored, because the code fails to return on an empty secret and computes an HMAC keyed with an empty string using a loose == comparison instead of hash_equals. Attackers can craft a recurring.agreement-stopped.v1 event with a known agreementId and a matching empty-key signature to cancel a victim's active WooCommerce subscription.
Title Pay with Vipps and MobilePay for WooCommerce before 6.4.1 Webhook Signature Forgery
First Time appeared Wphostingdev
Wphostingdev pay With Vipps And Mobilepay For Woocommerce
Weaknesses CWE-347
CPEs cpe:2.3:a:wphostingdev:pay_with_vipps_and_mobilepay_for_woocommerce:*:*:*:*:*:*:*:*
Vendors & Products Wphostingdev
Wphostingdev pay With Vipps And Mobilepay For Woocommerce
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 4, 2026, 6:47 PM
Reserved
Nov 4, 2026, 12:58 PM
Status
Deferred
Published
Nov 4, 2026, 1:17 PM
Modified
Nov 12, 2026, 9:36 PM