Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-100670— Grav CMS 2.0.14 through 2.0.24 Privilege Escalation via Blueprint Guard Bypass

Quick assessment

Affected
getgrav grav
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grav CMS 2.0.14 至 2.0.24 版本在用户组和账户的蓝图文档（blueprints）中存在权限提升漏洞。访问控制映射由一个 守卫（guard）机制进行限制，该守卫通过字段的精确路径进行解析。然而，当提交采用平面点表示法（flat dot-notation）的键，例如 （而非嵌套形式的 ）时，不会匹配任何蓝图文档规则，从而能够绕过 BlueprintSchema::filterArray() 的过滤和展平操作，并最终由 FlexObject::update() 通过 setNestedPropert

CVSS 8.8 · High EPSS 0.30% · P21
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-100670

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Grav CMS 2.0.14 through 2.0.24 Privilege Escalation via Blueprint Guard Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Grav CMS 2.0.14 through 2.0.24 contains a privilege escalation vulnerability in the group and account blueprints. The access map is gated by a `security@: admin.super` guard that is resolved by the field's exact path, so a submitted flat dot-notation key such as `access.admin.super` (instead of the nested `access[admin][super]`) matches no blueprint rule, survives BlueprintSchema::filterArray() and flattening, and is written by FlexObject::update() via setNestedProperty(), which splits on `.` and reconstructs the nested value. An authenticated backend operator using the flex accounts backend who holds admin.users but not admin.super can therefore grant admin.super to their own account or to a group they belong to and escalate to full super-admin, gaining control over configuration, plugin and theme installation, the file manager, and all accounts. Fixed in 2.0.25, which drops any dotted key whose ancestor path is disabled or marked validate.ignore.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 2.0.25 -

II. Public POCs for CVE-2026-100670

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-100670

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-100670 (1)

Other References for CVE-2026-100670 (1)

Same Patch Batch · getgrav · 2026-09-26 · 7 CVEs total

CVE-2026-100673 8.2 HIGH Grav Data Manager before 1.4.5 Stored XSS via item-detail view
CVE-2026-100671 8.0 HIGH Grav before 2.0.25 Session Cookie Theft via Twig Sandbox
CVE-2026-100669 7.5 HIGH Grav before 2.0.25 Sensitive File Disclosure via Case-Variation Bypass
CVE-2026-100672 7.5 HIGH grav-plugin-comments before 1.2.11 Unauthenticated Information Disclosure
CVE-2026-100668 6.5 MEDIUM Grav before 2.0.25 Sandbox Escape via array Filter
CVE-2026-100667 5.3 MEDIUM grav-plugin-login 3.8.7 through 3.9.6 Two-Factor Authentication Bypass

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-639

V. Comments for CVE-2026-100670

No comments yet

Leave a comment