CVE-2026-121970 (GCVE-0-2026-121970)
Vulnerability from cvelistv5 – Published: 2026-11-04 13:01 – Updated: 2026-11-04 18:47 X_Open Source
VLAI
EPSS
VEX
Title
Pay with Vipps and MobilePay for WooCommerce before 6.4.1 Webhook Signature Forgery
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 18:46 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://wordpress.org/plugins/woo-vipps/#developers | patchrelease-notes |
| https://plugins.trac.wordpress.org/browser/woo-vi… | |
| https://plugins.trac.wordpress.org/browser/woo-vi… | |
| https://www.vulncheck.com/advisories/pay-with-vip… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wphostingdev | Pay with Vipps and MobilePay for WooCommerce |
Affected:
5.0.0 , < 6.4.1
(semver)
cpe:2.3:a:wphostingdev:pay_with_vipps_and_mobilepay_for_woocommerce:*:*:*:*:*:*:*:* |
Date Public
2026-11-03 00:00
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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