CVE-2026-16990— Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation
Quick assessment
Affected
Unknown Payment Button for PayPal
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.
WordPress Payment Button for PayPal是WordPress基金会的一个支付按钮插件。 WordPress Payment Button for PayPal 1.2.3.44及之前版本存在处理逻辑错误漏洞，该漏洞源于未在服务端强制执行商家配置的价格并信任客户端提供的支付金额，可能导致未经身份验证的攻击者以任意较低金额创建真实的PayPal订单。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Unknown | Payment Button for PayPal | ≤ 1.2.3.44 |
affected |
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I. Basic Information for CVE-2026-16990
Vulnerability Information
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Vulnerability Title
Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation
Source: CVE Program / CVE List V5
Vulnerability Description
The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Payment Button for PayPal 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Payment Button for PayPal是WordPress基金会的一个支付按钮插件。 WordPress Payment Button for PayPal 1.2.3.44及之前版本存在处理逻辑错误漏洞，该漏洞源于未在服务端强制执行商家配置的价格并信任客户端提供的支付金额，可能导致未经身份验证的攻击者以任意较低金额创建真实的PayPal订单。
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 |
|---|---|---|---|---|
| Unknown | Payment Button for PayPal | 0 ~ 1.2.3.44 | - |
|
II. Public POCs for CVE-2026-16990
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-16990 (1)
-
🔗 Payment Button for PayPal <= 1.2.3.44 – Unauthenticated Payment Price Manipulation | CVE 2026-16990 | Plugin Vulnerabilities Read full article exploit vdb-entry technical-description
Same Patch Batch · Unknown · 2026-08-12 · 44 CVEs total
| CVE-2026-16747 | 6.5 MEDIUM | Kirki < 6.2.1 - Unauthenticated Arbitrary Shortcode Execution via Form Email Actions |
| CVE-2026-15045 | 6.5 MEDIUM | Wallet System for WooCommerce < 2.7.10 - Customer+ Checkout Price Manipulation via Unvalid |
| CVE-2026-17008 | 5.3 MEDIUM | Quick PayPal Payments <= 5.7.50 - Unauthenticated Payment Bypass via PayPal IPN |
| CVE-2026-16621 | 5.3 MEDIUM | Payment Gateway for PayPal on WooCommerce < 9.2.1 - Unauthenticated Payment Bypass via Pay |
| CVE-2026-15213 | 5.3 MEDIUM | Welcart e-Commerce < 2.11.33 - Unauthenticated Payment Bypass via Forged Settlement Callba |
| CVE-2026-18044 | 3.7 LOW | Estatik Real Estate Plugin < 4.3.4 - Unauthenticated Arbitrary-Recipient Mail Relay via Si |
| CVE-2026-18789 | Ezoic < 2.23.1 - Unauthenticated Database Export via Content Export REST Routes | |
| CVE-2026-17013 | WP Photo Album Plus < 9.2.07.002 - Reflected XSS via lbstart | |
| CVE-2026-18962 | WP Photo Album Plus < 9.2.09.002 - Subscriber+ Cross-Album File Upload via Missing Authori | |
| CVE-2026-19052 | ProSolution WP Client < 2.0.9 - Subscriber+ proSol_ajaxTablesync and proSol_ajaxClearlog C | |
| CVE-2026-19073 | Order Sync with Zendesk for WooCommerce < 2.2.3 - Unauthenticated Customer Order Data Disc | |
| CVE-2026-19217 | Royal Elementor Addons < 1.7.1065 - Contributor+ Stored XSS via Icon Box Widget | |
| CVE-2026-19050 | ProSolution WP Client < 2.0.9 - Subscriber+ SSRF via proSol_url_validate | |
| CVE-2026-18057 | Events Manager < 7.4.1 - Subscriber+ Booking Consent Record Tampering via SQL Injection | |
| CVE-2026-18049 | WP Photo Album Plus < 9.2.07.002 - Unauthenticated Option Disclosure via gettogo | |
| CVE-2026-18366 | Events Manager < 7.4.1 - Unauthenticated Privilege Escalation to Administrator | |
| CVE-2026-18230 | WP Directory Kit < 1.5.6 - Subscriber+ SQL Injection via section Parameter | |
| CVE-2026-18391 | WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection | |
| CVE-2026-18048 | WP Photo Album Plus < 9.2.07.002 - Unauthenticated Arbitrary ZIP File Deletion via delmyzi | |
| CVE-2026-18046 | Cookie Consent < 0.0.10 - Subscriber+ MaxMind License Key Update |
Showing top 20 of 44 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-16990
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