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CVE-2026-5356— LatePoint - Calendar Booking Plugin for Appointments and Events <= 5.4.0 - Unauthenticated Stripe PaymentIntent Amount-Binding Bypass

Quick assessment

Affected
latepoint LatePoint – Calendar Booking Plugin for Appointments and Events
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

latepoint LatePoint – Calendar Booking Plugin for Appointments and Events是latepoint个人开发者的日历预订插件。 LatePoint Calendar Booking Plugin for Appointments and Events 5.4.0及之前版本存在授权问题漏洞，该漏洞源于Stripe Connect支付处理器接受客户端提供的PaymentIntent ID，导致输入验证不当，可能使未经身份验证的攻击者通过提供先前

CVSS 7.5 · High EPSS 0.36% · P27

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
latepoint LatePoint – Calendar Booking Plugin for Appointments and Events ≤ 5.4.0 affected
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I. Basic Information for CVE-2026-5356

Vulnerability Information
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Vulnerability Title
LatePoint - Calendar Booking Plugin for Appointments and Events <= 5.4.0 - Unauthenticated Stripe PaymentIntent Amount-Binding Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
The LatePoint – Calendar Booking Plugin for Appointments and Events plugin for WordPress is vulnerable to Improper Input Validation in all versions up to, and including, 5.4.0. This is due to the plugin's Stripe Connect payment processor accepting a client-supplied PaymentIntent ID. This makes it possible for unauthenticated attackers to pay an arbitrary amount by supplying a previously succeeded PaymentIntent token.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
LatePoint Calendar Booking Plugin for Appointments and Events 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
latepoint LatePoint – Calendar Booking Plugin for Appointments and Events是latepoint个人开发者的日历预订插件。 LatePoint Calendar Booking Plugin for Appointments and Events 5.4.0及之前版本存在授权问题漏洞，该漏洞源于Stripe Connect支付处理器接受客户端提供的PaymentIntent ID，导致输入验证不当，可能使未经身份验证的攻击者通过提供先前
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
latepoint LatePoint – Calendar Booking Plugin for Appointments and Events 0 ~ 5.4.0 -

II. Public POCs for CVE-2026-5356

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III. Intelligence Information for CVE-2026-5356

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Patches & Fixes for CVE-2026-5356 (1)

News Coverage for CVE-2026-5356 (1)

IV. Related Vulnerabilities

Same product: LatePoint – Calendar Booking Plugin for Appointments and Events
Same vendor: latepoint
Same weakness: CWE-862

V. Comments for CVE-2026-5356

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