Description
The GetPaid WordPress plugin before 2.8.55 does not verify the authenticity of incoming Worldpay payment notifications, allowing unauthenticated attackers to forge a notification that marks a pending invoice as paid without any payment being made.
Published: 2026-08-06
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The GetPaid WordPress plugin prior to version 2.8.55 lacks proper verification of incoming Worldpay payment notifications. An attacker can forge the notification and cause a pending invoice to be marked as paid without any real payment transaction, resulting in potential financial loss for the site owner.

Affected Systems

WordPress sites running the GetPaid plugin before version 2.8.55 are affected. The vulnerability exists in all instances of the plugin in this version range and applies to any configuration that uses Worldpay IPN notifications without additional authentication.

Risk and Exploitability

The CVSS score of 5.9 indicates moderate severity, and the vulnerability is not listed in the CISA KEV catalog. The EPSS score of < 1% indicates a very low probability of exploitation, but the flaw permits unauthenticated attackers to send forged IPN data over the network to the site’s notification endpoint. This remote attack path can lead to unauthorized invoice completion and revenue loss.

Generated by OpenCVE AI on August 7, 2026 at 17:40 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade the GetPaid plugin to version 2.8.55 or later to implement proper IPN verification.
  • Restrict the IPN endpoint to accept requests only from Worldpay’s official IP addresses until a patch is available.
  • Verify that any payment confirmation requests are properly authenticated and that the payment gateway’s signature or token is validated before updating invoice status.

Generated by OpenCVE AI on August 7, 2026 at 17:40 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 07 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-285

Fri, 07 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-345
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 07 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-285

Thu, 06 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Description The GetPaid WordPress plugin before 2.8.55 does not verify the authenticity of incoming Worldpay payment notifications, allowing unauthenticated attackers to forge a notification that marks a pending invoice as paid without any payment being made.
Title GetPaid < 2.8.55 - Unauthenticated Worldpay Payment Bypass via Insufficient IPN Verification
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-08-07T14:08:39.639Z

Reserved: 2026-06-22T14:05:16.914Z

Link: CVE-2026-12901

cve-icon Vulnrichment

Updated: 2026-08-07T14:08:34.917Z

cve-icon NVD

Status : Deferred

Published: 2026-08-06T22:16:45.457

Modified: 2026-08-26T16:31:16.753

Link: CVE-2026-12901

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-07T17:45:03Z

Weaknesses
  • CWE-345

    Insufficient Verification of Data Authenticity