CVE-2026-4911Network attack vector

Unauthenticated price manipulation via unchecked PaymentIntent amount

Published Apr 28, 2026 · Updated Apr 28, 2026

Price manipulation in MASAAKI TANAKA Booking Package 1.7.06 and earlier allows remote attackers to book services at arbitrary prices. intentForStripe() sends the user-controlled amount parameter to Stripe's PaymentIntent API, while commitStripe() ignores the price computed by getAmount(). Unauthenticated access to a Stripe-enabled booking form is sufficient to complete a booking after paying an attacker-selected amount.

CVSS severity5.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Price manipulation in MASAAKI TANAKA Booking Package 1.7.06 and earlier allows remote attackers to book services at arbitrary prices. intentForStripe() sends the user-controlled amount parameter to Stripe's PaymentIntent API, while commitStripe() ignores the price computed by getAmount(). Unauthenticated access to a Stripe-enabled booking form is sufficient to complete a booking after paying an attacker-selected amount.

The record

CVE
CVE-2026-4911
Published
Apr 28, 2026
Updated
Apr 28, 2026
Vendor
MASAAKI TANAKA
Product
Booking Package
Classifications
CWE-472, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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 <=1.7.06

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MASAAKI TANAKA · Booking Packageversion=0 <=1.7.06

Published CVSS scores

5.3WordfenceCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-472External Control of Assumed-Immutable Web Parameter
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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