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CVE-2026-85598— Grav 2.0.0 through 2.0.17 Stored XSS via Modular Pages

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 2.0.0版本至2.0.17版本存在跨站脚本漏洞，该漏洞源于未对模块化页面应用保存时XSS检测，导致经过身份验证的页面编辑器能够存储Twig组装的XSS有效载荷。具有页面编辑权限的攻击者可创建包含恶意Twig代码的模块化页面，当父页面渲染时在访客浏览器中执行，包括在管理员会话中执行。

CVSS 6.4 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
getgrav grav 2.0.0≤ 2.0.17 affected
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I. Basic Information for CVE-2026-85598

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 2.0.0 through 2.0.17 Stored XSS via Modular Pages
Source: CVE Program / CVE List V5
Vulnerability Description
Grav versions 2.0.0 through 2.0.17 fail to apply save-time XSS detection to modular pages, allowing authenticated page editors to store Twig-assembled XSS payloads. Attackers with page-edit rights can create modular pages with malicious Twig code that executes in visitor browsers when the parent page is rendered, including in administrator sessions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 跨站脚本漏洞
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 2.0.0版本至2.0.17版本存在跨站脚本漏洞，该漏洞源于未对模块化页面应用保存时XSS检测，导致经过身份验证的页面编辑器能够存储Twig组装的XSS有效载荷。具有页面编辑权限的攻击者可创建包含恶意Twig代码的模块化页面，当父页面渲染时在访客浏览器中执行，包括在管理员会话中执行。
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 2.0.0 ~ 2.0.17 -

II. Public POCs for CVE-2026-85598

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III. Intelligence Information for CVE-2026-85598

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Vendor Advisories for CVE-2026-85598 (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-2026-85603 6.5 MEDIUM Grav Admin Plugin Path Traversal via Save As Language Code
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-79

V. Comments for CVE-2026-85598

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