CVE-2026-61451: Grav before 1.0.4: Password Reset Token Leaked via Fake Email

Summary

Grav users are at risk of account takeover if an attacker sends a fake password reset email with a link to a server they control. This can happen if an attacker sends a malicious request to the Grav API, which doesn't properly check the email link. To protect yourself, update Grav to version 1.0.4 or later.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions
getgrav	grav	< 1.0.4

Original title

The Grav API plugin (grav-plugin-api) before 1.0.4 does not validate the origin of the client-supplied admin_base_url field in the POST /api/v1/auth/forgot-password endpoint. The sanitizeHttpUrl() ...

Original description

The Grav API plugin (grav-plugin-api) before 1.0.4 does not validate the origin of the client-supplied admin_base_url field in the POST /api/v1/auth/forgot-password endpoint. The sanitizeHttpUrl() function only checks that the URL scheme is http/https and never verifies the host against the server's own origin, so an attacker can supply an arbitrary host. As a result, an unauthenticated attacker can cause the password reset email sent to a victim to contain a reset link pointing at an attacker-controlled server; when the victim follows the link, the valid reset token is disclosed to the attacker, enabling full account takeover. The vulnerable base URL can also be influenced via the Referer or Origin headers.

nvd CVSS3.1 9.6

nvd CVSS4.0 9.4

Vulnerability type

CWE-601 Open Redirect