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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 的 2.0.0 至 2.0.17 版本在保存时未能对模块化页面应用 XSS 检测，使得具备页面编辑权限的用户能够存储由 Twig 组装的 XSS 载荷。拥有页面编辑权限的攻击者可以创建包含恶意 Twig 代码的模块化页面，这些代码在父页面渲染时（包括管理员会话中）会在访问者的浏览器中执行。

CVSS 6.4 · Medium

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
getgrav grav 2.0.0≤ 2.0.24 affected
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I. Basic Information for CVE-2026-85598

Vulnerability Information
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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

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 2.0.0 ~ 2.0.24 -

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 2.0.19 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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