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CVE-2026-89411— Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbound Stripe PaymentIntent

Quick assessment

Affected
Unknown Paymattic
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.

Paymattic WordPress 插件（版本低于 4.6.26 但高于或等于 4.6.20）存在安全漏洞，该插件未验证已确认的 Stripe 付款是否确实关联到其所应用的订单，导致未授权攻击者可以通过确认一笔较小的自有付款，将任意待处理订单标记为已支付。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-89411

Vulnerability Information
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Vulnerability Title
Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbound Stripe PaymentIntent
Source: CVE Program / CVE List V5
Vulnerability Description
The Paymattic WordPress plugin from 4.6.20 before 4.6.26 does not verify that a confirmed Stripe payment belongs to the order it is applied to, allowing unauthenticated users to mark an arbitrary pending order as paid by confirming a smaller payment of their own against it.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Paymattic 4.6.20 ~ 4.6.26 -

II. Public POCs for CVE-2026-89411

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III. Intelligence Information for CVE-2026-89411

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Other References for CVE-2026-89411 (1)

Same Patch Batch · Unknown · 2026-09-28 · 8 CVEs total

CVE-2026-84744 6.5 MEDIUM WPForms Lite 1.5.0.1 - 2.0.2 - Unauthenticated Arbitrary Shortcode Execution via Form Fiel
CVE-2026-88828 5.4 MEDIUM Blacklist Manager for WooCommerce 1.3.0 - 2.3.1 - Blocked User Restriction Bypass via XML-
CVE-2026-92996 5.3 MEDIUM Verge3D 4.1.0 - 4.13.0 - Unauthenticated Payment Bypass via v3d_payment_done
CVE-2026-86838 5.3 MEDIUM Bookly < 28.3 - Unauthenticated Payment Bypass via Booking Price Manipulation
CVE-2026-93000 SPS-Suite <= 1.4.0 - Unauthenticated Time-Based SQLi via Search
CVE-2026-89300 WP Verify API <= 1.0.0 - Unauthenticated Verification Code Email Sending to Arbitrary Reci
CVE-2026-89303 Post Voting System <= 1.0 - Subscriber+ SQLi via 'row' Parameter

IV. Related Vulnerabilities

Same vendor: Unknown

V. Comments for CVE-2026-89411

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