Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbound Stripe PaymentIntent (CVE-2026-89411) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-89411

Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbound Stripe PaymentIntent

Answer in brief

CVE-2026-89411 records a Medium severity (CVSS 5.3) vulnerability in Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbound Stripe PaymentIntent. The current sources do not mark it as known exploited. The current feed maps Unknown/Paymattic (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 28, 2026Updated Sep 28, 2026Source checked Sep 28, 2026First seen by HOL Sep 28, 2026Material review Sep 28, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/Paymattic (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Paymatticgeneric	>=4.6.20 <4.6.26	4.6.26

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Paymattic.
Review the reported fix. Update Unknown/Paymattic to 4.6.26 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 28, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.