CVE-2026-121970
MEDIUM
MEDIUM
Priority: 0.00
BB Relevance:
63/100
Published: 2026-11-04
Modified: 2026-11-04
First seen: 2026-11-04
Status: active
Attack Surface
Network
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
None
UI:
None
S:
X
AT:
Present
VC:
None
VI:
Low
VA:
None
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.
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| wphostingdev | Pay with Vipps and MobilePay for WooCommerce | 5.0.0 < 6.4.1 |
| wphostingdev | Pay with Vipps and MobilePay for WooCommerce | 5.0.0 < 6.4.1 |