EUVD-2026-49080
GHSA-66xh-mw5m-g493
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
Requires user interaction; scope change with low confidentiality impact.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
5DescriptionCVE.org
The Contact Form 7 WordPress plugin before 2.5 does not validate the host of a user-supplied return URL before using it as the success and cancel redirect targets of a Stripe checkout, allowing an unauthenticated attacker to redirect a victim, via a crafted link, to an arbitrary external site after the checkout flow.
AnalysisAI
Open redirect vulnerability in Contact Form 7 WordPress plugin prior to version 2.5 allows unauthenticated attackers to redirect victims to arbitrary external sites after the Stripe checkout flow. Publicly available exploit code exists, but no active exploitation has been confirmed. With a CVSS score of 4.7 (medium) and low EPSS not provided, the risk is moderate due to required user interaction and limited impact.
Technical ContextAI
This is a CWE-601 URL Redirection to Untrusted Site (Open Redirect) vulnerability in the Contact Form 7 plugin, a popular WordPress plugin that integrates with Stripe for payment processing. The plugin fails to validate the host of user-supplied return URLs used as success and cancel redirect targets. The CPE string (cpe:2.3:a:unknown:contact_form_7:*:*:*:*:*:*:*:*) indicates the product is Contact Form 7 with an unknown vendor designation. The flaw occurs in the checkout flow where an attacker can supply a malicious URL that is used after payment completion, leading to a redirect to an attacker-controlled site.
RemediationAI
The primary remediation is to update the Contact Form 7 plugin to version 2.5 or later, which includes proper validation of return URLs. The vendor-released patch is available through the WordPress plugin repository. For environments where immediate patching is not feasible, consider implementing a custom input validation hook to sanitize redirect parameters or using a web application firewall (WAF) to block malicious redirect attempts. Note that disabling the Stripe checkout feature would prevent exploitation but also break payment functionality. Advisory: https://wpscan.com/vulnerability/b53cc13d-c59e-4c11-aa71-fa1c38c2a34d/
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External POC / Exploit Code
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