CVE-2026-81649

Fundiin <= 3.4.0 - Unauthenticated Payment Gateway Settings Update and Credential Disclosure

Published Oct 11, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
The Fundiin cho WooCommerce WordPress plugin through 3.4.0 does not have proper authorisation on several of its REST API routes, relying instead on a credential that is identical on every installation, allowing unauthenticated attackers to disclose the store's payment credentials and customer order data, overwrite the payment gateway configuration so that payments are credited elsewhere, and mark unpaid orders as paid. The same missing authorisation also allows arbitrary script to be stored in a field which is output unescaped on the classic checkout, leading to unauthenticated stored XSS on stores that do not use the block-based checkout.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
Weaknesses CWE-863
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-200
CWE-284
CWE-79
Type Values Removed Values Added
Description The Fundiin cho WooCommerce WordPress plugin through 3.4.0 does not have proper authorisation on several of its REST API routes, relying instead on a credential that is identical on every installation, allowing unauthenticated attackers to disclose the store's payment credentials and customer order data, overwrite the payment gateway configuration so that payments are credited elsewhere, and mark unpaid orders as paid. The same missing authorisation also allows arbitrary script to be stored in a field which is output unescaped on the classic checkout, leading to unauthenticated stored XSS on stores that do not use the block-based checkout.
Title Fundiin <= 3.4.0 - Unauthenticated Payment Gateway Settings Update and Credential Disclosure
References

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Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Oct 11, 2026, 11:32 AM
Reserved
Aug 27, 2026, 9:27 AM
Status
Deferred
Published
Oct 11, 2026, 7:17 AM
Modified
Oct 13, 2026, 8:36 PM