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CVE-2026-85603— Grav Admin Plugin Path Traversal via Save As Language Code

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是Grav组织开源的一款基于文件的扁平化内容管理系统。 Grav 1.10.55之前版本存在输入验证错误漏洞，该漏洞源于admin插件的Save As操作未能验证语言代码参数，导致具有admin.pages.create权限的已认证管理员用户可在lang POST字段中提供目录遍历序列，从而在pages目录之外写入包含攻击者控制内容的任意.md文件。

CVSS 6.5 · Medium EPSS 0.62% · P49

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 1.10.55 affected
1.10.55 unaffected
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I. Basic Information for CVE-2026-85603

Vulnerability Information
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Vulnerability Title
Grav Admin Plugin Path Traversal via Save As Language Code
Source: CVE Program / CVE List V5
Vulnerability Description
Grav versions before 1.10.55 contain a path traversal vulnerability in the admin plugin's Save As action that fails to validate the language code parameter. An authenticated admin user with admin.pages.create permission can supply directory traversal sequences in the lang POST field to write arbitrary .md files outside the pages directory with attacker-controlled content.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grav是Grav组织开源的一款基于文件的扁平化内容管理系统。 Grav 1.10.55之前版本存在输入验证错误漏洞，该漏洞源于admin插件的Save As操作未能验证语言代码参数，导致具有admin.pages.create权限的已认证管理员用户可在lang POST字段中提供目录遍历序列，从而在pages目录之外写入包含攻击者控制内容的任意.md文件。
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 ~ 1.10.55 -

II. Public POCs for CVE-2026-85603

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III. Intelligence Information for CVE-2026-85603

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Vendor Advisories for CVE-2026-85603 (2)

Same Patch Batch · getgrav · 2026-09-04 · 7 CVEs total

CVE-2026-85604 8.8 HIGH Grav before 2.0.18 Remote Code Execution via sort filter
CVE-2026-85599 7.2 HIGH Grav Shortcode Core before 6.2.5 Stored XSS via unescaped parameters
CVE-2026-85598 6.4 MEDIUM Grav 2.0.0 through 2.0.17 Stored XSS via Modular Pages
CVE-2026-85600 5.4 MEDIUM Grav Admin before 2.0.21 Stored XSS via username
CVE-2026-85601 5.4 MEDIUM Grav Admin before 2.0.20 Cross-Site Scripting via marked.js
CVE-2026-85602 5.3 MEDIUM Grav Form Plugin before 9.1.20 reCAPTCHA v3 Authentication Bypass

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-73