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TI-2026-80259 Aliases CVE-2026-103299GHSA-3fmh-h32q-9jjr

Improper authentication in Nexi Alpha Bank for WooCommerce plugin

Priority LOW 29CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.

Summary

The Payment Gateway WordPress plugin through 2.2.0 does not ensure a shared secret is configured before using it to authenticate the bank's payment-notification callback. An unauthenticated remote attacker can forge a notification and mark any WooCommerce order as paid on installs where the secret is not set, and can move any pending order to a failed state whether or not the secret is set. This is an improper authentication flaw (CWE-287). A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

The Payment Gateway WordPress plugin through 2.2.0 does not ensure a shared secret is configured before using it to authenticate the bank's payment-notification callback, allowing unauthenticated attackers to forge a valid notification and mark any WooCommerce order as paid on installs where the secret has not been set, and the same callback lets them move any pending order to a failed state whether or not the secret is configured.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00182 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownPayment Gatewayup to 2.2.0—No fix listedCNA
  • Payment Gateway VendorUnknown Affected up to 2.2.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Payment Gateway.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-103299
  2. 2026-10-27 Alias added: GHSA-3fmh-h32q-9jjr
  3. 2026-10-30 CVSS score added · CISA ADP
  4. 2026-10-30 Weakness changed · CISA ADP
  5. 2026-10-30 CISA SSVC decision points changed

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences