Vulnerability · Published Jul 15, 2026 · Assigned by VulnCheck

CVE-2026-61451Grav API Plugin before 1.0.4 Password Reset Token Poisoning via admin_base_url

Critical 9.6

In plain English

A critical-severity open redirect in grav-plugin-api from getgrav. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)0.3%top 75.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
getgrav	grav-plugin-api	0 – before 1.0.4

Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-5xc4-j99p-cp4m) vendor-advisory
VulnCheck Advisory: Grav before 1.0.4 Password Reset Token Poisoning via admin_base_url third-party-advisory