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TI-2026-78592 Aliases CVE-2026-104641GHSA-g546-6f38-794c

Payment bypass in Simple Shopping Cart WordPress plugin

Priority LOW 29CWE-345Published · 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 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

The Simple Shopping Cart WordPress plugin before 5.3.3 does not verify that a PayPal payment notification is for a payment received by the site owner's PayPal account in its default configuration. Insufficient verification of data authenticity (CWE-345) lets an unauthenticated remote attacker have their orders marked as paid using a payment made to an account they control. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The Simple Shopping Cart WordPress plugin before 5.3.3 does not verify that a PayPal payment notification is for a payment received by the site owner's PayPal account in its default configuration, allowing unauthenticated attackers to have their orders marked as paid using a payment made to an account they control.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00145 3rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Simple Shopping Cart (Unknown): 5.3.3

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
UnknownSimple Shopping Cartbefore 5.3.35.3.3Patch availableCNA
  • Simple Shopping Cart VendorUnknown Affected before 5.3.3 Fixed in 5.3.3 Patch available CNA

Remediation

Update Simple Shopping Cart to version 5.3.3 or later, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Simple Shopping Cart (Unknown) Fixed in 5.3.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Simple Shopping Cart 5.3.3

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-78593 Price verification bypass in Simple Shopping Cart WordPress pluginPriority LOW 13
    Show all 2 records →

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-104641
  2. 2026-10-21 Alias added: GHSA-g546-6f38-794c

References

Exploit 1

Sources

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