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CVE-2026-85601— Grav Admin before 2.0.20 Cross-Site Scripting via marked.js

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 2.0.20之前版本存在跨站脚本漏洞，该漏洞源于在MarkdownEditor和MarkdownModal组件中通过Svelte的{@html}指令将marked.parse()的输出注入DOM前未进行清理，攻击者可在插件或主题变更日志中注入javascript: URI方案，从而在已认证的管理员会话中执行任意代码。

CVSS 5.4 · Medium EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 2.0.20 affected
2.0.20 unaffected
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I. Basic Information for CVE-2026-85601

Vulnerability Information
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Vulnerability Title
Grav Admin before 2.0.20 Cross-Site Scripting via marked.js
Source: CVE Program / CVE List V5
Vulnerability Description
Grav Admin before 2.0.20 fails to sanitize output from marked.parse() before injecting it into the DOM via Svelte's {@html} directive in MarkdownEditor and MarkdownModal components. Attackers can inject javascript: URI schemes in plugin or theme changelogs to execute arbitrary code in authenticated admin sessions without requiring site access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 2.0.20之前版本存在跨站脚本漏洞，该漏洞源于在MarkdownEditor和MarkdownModal组件中通过Svelte的{@html}指令将marked.parse()的输出注入DOM前未进行清理，攻击者可在插件或主题变更日志中注入javascript: URI方案，从而在已认证的管理员会话中执行任意代码。
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 ~ 2.0.20 -

II. Public POCs for CVE-2026-85601

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III. Intelligence Information for CVE-2026-85601

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Vendor Advisories for CVE-2026-85601 (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-2026-85598 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-2026-85602 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-2026-85601

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