getgrav Grav up to 1.0.3 API Plugin forgot-password sanitizeHttpUrl admin_base_url password recovery

Summaryinfo

A vulnerability, which was classified as critical, has been found in getgrav Grav up to 1.0.3. Affected by this vulnerability is the function sanitizeHttpUrl of the file /api/v1/auth/forgot-password of the component API Plugin. The manipulation of the argument admin_base_url leads to password recovery. This vulnerability is uniquely identified as CVE-2026-61451. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in getgrav Grav up to 1.0.3 and classified as critical. This issue affects the function sanitizeHttpUrl of the file /api/v1/auth/forgot-password of the component API Plugin. The manipulation of the argument admin_base_url with an unknown input leads to a password recovery vulnerability. Using CWE to declare the problem leads to CWE-640. The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-61451 since 07/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

Upgrading to version 1.0.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-44648). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• getgrav

Name

• Grav

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3

Website

• Product: https://github.com/getgrav/grav/

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Be aware that VulDB is the high quality source for vulnerability data.

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