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

Quick assessment

Affected
getgrav grav
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

getgrav Grav是getgrav个人开发者开源的一套可扩展的内容管理系统。 getgrav Grav 1.0.4之前版本存在输入验证错误漏洞，该漏洞源于未验证客户端提供的admin_base_url字段来源，可能导致未经身份验证的攻击者使密码重置邮件包含指向攻击者控制服务器的重置链接，从而导致账户接管。

CVSS 9.6 · Critical EPSS 0.42% · P34

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 1.0.4 affected
1.0.4 unaffected
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I. Basic Information for CVE-2026-61451

Vulnerability Information
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Vulnerability Title
Grav before 1.0.4 Password Reset Token Poisoning via admin_base_url
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
getgrav Grav 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
getgrav Grav是getgrav个人开发者开源的一套可扩展的内容管理系统。 getgrav Grav 1.0.4之前版本存在输入验证错误漏洞，该漏洞源于未验证客户端提供的admin_base_url字段来源，可能导致未经身份验证的攻击者使密码重置邮件包含指向攻击者控制服务器的重置链接，从而导致账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 1.0.4 -

II. Public POCs for CVE-2026-61451

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7301 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-61451

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Vendor Advisories for CVE-2026-61451 (2)

Same Patch Batch · getgrav · 2026-07-15 · 7 CVEs total

CVE-2026-58655 8.8 HIGH Grav Flex Objects - Server-Side Template Injection via Dynamic Titles
CVE-2026-61457 8.8 HIGH Grav before 1.0.3 Remote Code Execution via File Upload Extension Bypass
CVE-2026-61873 8.1 HIGH Grav before 9.1.8 Arbitrary File Write via Twig-Processed Filename
CVE-2026-61449 6.5 MEDIUM Grav before 2.0.2 Decompression Bomb via Forged ZIP Size
CVE-2026-61453 6.1 MEDIUM Grav before 2.0.1 XSS via Twig String Concatenation
CVE-2026-61452 5.3 MEDIUM Grav before 2.0.4 Improper Session Invalidation JWT Access Tokens

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-601

V. Comments for CVE-2026-61451

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