CVE-2026-15147Public exploitNetwork attack vector

Unauthenticated booking confirmation via unbound PayPal notifications

Published Aug 6, 2026 · Updated Aug 6, 2026

Payment validation bypass in Rustaurius Five Star Restaurant Reservations before 2.7.23 allows remote attackers to confirm unpaid bookings. The PayPal IPN handler accepts a genuine VERIFIED notification without checking the receiver, amount, payment status, or ownership, and trusts its booking_id field. Exploitation requires PayPal deposits and a pending reservation identifier; no WordPress account is required, and the booking becomes paid and confirmed with an attacker-controlled underpayment and receipt.

CVSS severity5.3
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Payment validation bypass in Rustaurius Five Star Restaurant Reservations before 2.7.23 allows remote attackers to confirm unpaid bookings. The PayPal IPN handler accepts a genuine VERIFIED notification without checking the receiver, amount, payment status, or ownership, and trusts its booking_id field. Exploitation requires PayPal deposits and a pending reservation identifier; no WordPress account is required, and the booking becomes paid and confirmed with an attacker-controlled underpayment and receipt.

The record

CVE
CVE-2026-15147
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Rustaurius
Product
Five Star Restaurant Reservations
Classifications
CWE-639, CWE-345, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.7.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rustaurius · Five Star Restaurant Reservationsversion=0 <2.7.23

Published CVSS scores

5.3WPScanCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CWE-345Insufficient Verification of Data Authenticity
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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