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.
Published: 2026-11-04
Score: 6.3 Medium
EPSS: n/a
KEV: No
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Wed, 04 Nov 2026 13:15:00 +0000

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'}

Subscriptions

Wphostingdev Pay With Vipps And Mobilepay For Woocommerce
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-04T18:47:15.201Z

Reserved: 2026-11-04T12:58:32.302Z

Link: CVE-2026-121970

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-04T13:17:29.670

Modified: 2026-11-04T13:17:29.670

Link: CVE-2026-121970

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T15:00:19Z

Weaknesses
  • CWE-347

    Improper Verification of Cryptographic Signature