Skip to main content

Grav CMS CVE-2026-59190

| EUVDEUVD-2026-42950 HIGH
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-07-10 GitHub_M
Authentication Bypass Grav
8.7
CVSS 4.0 · Vendor: GitHub_M
Share

Severity by source

Vendor (GitHub_M) PRIMARY
8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.8 HIGH

Network-reachable admin endpoint with low complexity and no user interaction; PR:L because a valid admin.users account is required, and full super-admin compromise yields high C/I/A.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jul 10, 2026 - 17:33 vuln.today

DescriptionCVE.org

grav-plugin-admin is an HTML user interface that provides a way to configure Grav and create and modify pages. In 1.10.52 and earlier, an authenticated attacker with admin.users permission can change the password of any user account, including the super administrator, by sending a direct POST request to /admin/user/{username}?task=save with data[password] because saveUser authorizes the caller's user-management permission but does not verify whether the caller may edit the target user. This issue is expected to be fixed in version 1.10.53.

AnalysisAI

{username}?task=save with data[password]. The saveUser handler checks that the caller has user-management rights but never verifies the caller is allowed to edit that specific target, an authorization gap (CWE-639) carrying a CVSS 4.0 score of 8.7. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate as admin.users-privileged account
Delivery
POST to /admin/user/admin?task=save with data[password]
Exploit
saveUser skips target authorization check
Execution
Super-admin password overwritten
Persist
Log in as super administrator
Impact
Full CMS takeover
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated Grav admin session whose role carries the admin.users permission (CVSS PR:L); the attacker does not need to be the super administrator or to have edit rights over the target account - that missing object-level check is precisely the bug. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine priority for any multi-user Grav deployment, though its blast radius is bounded by a precondition. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A company delegates day-to-day account management to a junior 'user manager' account that has only the admin.users permission and no super-admin rights. That user (or an attacker who has phished the manager's credentials) sends a single POST to /admin/user/admin?task=save with data[password]=NewPass!, silently overwriting the super administrator's password, then logs in as the super admin to take full control of the CMS. …
Remediation Upgrade grav-plugin-admin to version 1.10.53, the release expected to fix this issue, once it is published; the upstream fix is available as commit 88f7ce8e50324472f492965caa42fb709a4f791a and is described in advisory GHSA-p97c-g455-q447 (https://github.com/getgrav/grav/security/advisories/GHSA-p97c-g455-q447). … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Audit all accounts granted user-management privileges; revoke access for any accounts no longer requiring it; enable detailed logging of user modification requests. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Grav

View all
CVE-2025-66294 HIGH POC
8.8 Dec 01

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Server-Side Template Injection (SSTI) vulnerability exists

CVE-2025-66301 CRITICAL POC
9.6 Dec 01

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, due to improper authorization checks when modifying critical

CVE-2025-50286 HIGH POC
8.1 Aug 06

A Remote Code Execution (RCE) vulnerability in Grav CMS v1.7.48 allows an authenticated admin to upload a malicious plug
CVE-2024-34082 CRITICAL POC
9.9 May 15

Grav is a file-based Web platform. Rated critical severity (CVSS 9.9), this vulnerability is remotely exploitable, low a
CVE-2021-47812 CRITICAL POC
9.8 Jan 16

GravCMS 1.10.7 allows unauthenticated remote attackers to write arbitrary YAML configuration files, leading to full serv
CVE-2025-66297 HIGH POC
8.8 Dec 01

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a user with admin panel access and permissions to create or e
CVE-2025-66299 HIGH POC
8.8 Dec 01

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, Grav CMS is vulnerable to a Server-Side Template Injection (S
CVE-2024-28119 HIGH POC
8.8 Mar 21

Grav is an open-source, flat-file content management system. Rated high severity (CVSS 8.8), this vulnerability is remot
CVE-2024-28118 HIGH POC
8.8 Mar 21

Grav is an open-source, flat-file content management system. Rated high severity (CVSS 8.8), this vulnerability is remot
CVE-2024-28117 HIGH POC
8.8 Mar 21

Grav is an open-source, flat-file content management system. Rated high severity (CVSS 8.8), this vulnerability is remot
CVE-2024-28116 HIGH POC
8.8 Mar 21

Grav is an open-source, flat-file content management system. Rated high severity (CVSS 8.8), this vulnerability is remot
CVE-2024-27921 HIGH POC
8.8 Mar 21

Grav is an open-source, flat-file content management system. Rated high severity (CVSS 8.8), this vulnerability is remot

Same weakness CWE-639 – Authorization Bypass Through User-Controlled Key

View all
CVE-2024-50483 CRITICAL
9.8
CVE-2026-55255 HIGH POC
8.4
CVE-2025-3605 CRITICAL POC
9.8
CVE-2022-3805 HIGH POC
8.6
CVE-2025-5947 CRITICAL POC
9.8
CVE-2020-36923 CRITICAL POC
9.8
CVE-2023-3048 CRITICAL POC
9.8
CVE-2024-27730 CRITICAL POC
9.8

Same technique Authentication Bypass

View all
CVE-2023-22515 CRITICAL POC
9.8
CVE-2012-4681 CRITICAL POC
9.8
CVE-2013-2465 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2012-1723 CRITICAL POC
9.8
CVE-2017-10271 HIGH POC
7.5
CVE-2015-1427 CRITICAL POC
9.8
CVE-2025-3248 CRITICAL POC
9.8

Share

CVE-2026-59190 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy