CVE-2026-121970
lowPay with Vipps and MobilePay for WooCommerce (woo-vipps) before 6.4.1 contains an improper cryptographic signature verification vulnerability in the recurring-…
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://plugins.trac.wordpress.org/browser/woo-vipps/trunk/recurring/changelog.txt disclosure@vulncheck.com
- https://plugins.trac.wordpress.org/browser/woo-vipps/trunk/recurring/includes/wc-vipps-rec... disclosure@vulncheck.com
- https://wordpress.org/plugins/woo-vipps/#developers disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/pay-with-vipps-and-mobilepay-for-woocommerce-before-w... disclosure@vulncheck.com