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TI-2026-81683 Aliases CVE-2026-103382GHSA-c348-5968-fp8m

Casso Flow access flaw lets attackers mark WooCommerce orders paid

Priority LOW 30CWE-284Published · 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
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-284.

Summary

The Casso Flow WordPress plugin before 4.2.0 does not properly authenticate incoming bank-transfer payment notifications. The token used to verify them is empty on a default installation, which is a missing access control check (CWE-284). An unauthenticated remote attacker can forge a notification and mark any pending WooCommerce order as paid, regardless of its payment method. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

The Casso Flow WordPress plugin before 4.2.0 does not properly authenticate incoming bank-transfer payment notifications, as the token used to verify them is empty on a default installation, allowing unauthenticated attackers to forge a notification and mark any pending WooCommerce order as paid, regardless of its payment method.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00231 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Casso Flow (Unknown): 4.2.0

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
UnknownCasso Flowbefore 4.2.04.2.0Patch availableCNA
  • Casso Flow VendorUnknown Affected before 4.2.0 Fixed in 4.2.0 Patch available CNA

Remediation

Update Casso Flow to version 4.2.0 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Casso Flow (Unknown) Fixed in 4.2.0

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-103382
  2. 2026-10-28 Alias added: GHSA-c348-5968-fp8m
  3. 2026-10-28 CVSS score added · CISA ADP
  4. 2026-10-28 Weakness changed · CISA ADP
  5. 2026-10-28 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