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CVE-2026-75828— Grav before 2.0.15 Stored XSS via detectXss() Quote Bypass

Quick assessment

Affected
getgrav grav
Exploitation
Public or AI PoC available; prioritize validation
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 2.0.15之前版本存在跨站脚本漏洞，该漏洞源于detectXss()函数中未加引号的属性值内的不配对引号绕过了事件处理程序检测，导致经过身份验证的编辑器可以注入事件处理程序（如onerror=）通过验证并在访问者浏览器中执行。

CVSS 8.7 · High EPSS 0.27% · P19

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 2.0.15 affected
2.0.15 unaffected
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I. Basic Information for CVE-2026-75828

Vulnerability Information
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Vulnerability Title
Grav before 2.0.15 Stored XSS via detectXss() Quote Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the detectXss() function where unpaired quotes in unquoted attribute values bypass event-handler detection. Authenticated editors can inject event handlers like onerror= that pass validation and execute in visitor browsers when page content is rendered.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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 2.0.15之前版本存在跨站脚本漏洞，该漏洞源于detectXss()函数中未加引号的属性值内的不配对引号绕过了事件处理程序检测，导致经过身份验证的编辑器可以注入事件处理程序（如onerror=）通过验证并在访问者浏览器中执行。
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 0 ~ 2.0.15 -

II. Public POCs for CVE-2026-75828

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7870 chars
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Trigger conditions & impact
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III. Intelligence Information for CVE-2026-75828

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Vendor Advisories for CVE-2026-75828 (2)

Same Patch Batch · getgrav · 2026-08-18 · 14 CVEs total

CVE-2026-75837 9.1 CRITICAL Grav before 2.0.14 Privilege Escalation via Group Access Field
CVE-2026-75836 8.8 HIGH Grav API Plugin before 1.0.14 Missing Authorization
CVE-2026-75827 8.8 HIGH Grav before 2.0.15 Arbitrary File Write via error_log
CVE-2026-75829 8.1 HIGH grav-plugin-api before 1.0.15 Twig SSTI via translate endpoint
CVE-2026-75831 7.6 HIGH Grav before 2.0.15 Stored XSS via audio/video source URL
CVE-2026-75830 7.1 HIGH grav-plugin-api before 1.0.15 Path Traversal via batchCopy
CVE-2026-74907 5.9 MEDIUM Grav before 2.0.15 Path Traversal via plugin-asset-map.php
CVE-2026-75107 5.4 MEDIUM Grav Form Plugin before 9.1.19 Stored XSS via Field Properties
CVE-2026-75834 5.4 MEDIUM Grav before 2.0.14 Stored XSS via Invalid UTF-8 Byte
CVE-2026-74908 4.6 MEDIUM Grav plugin-api before 1.0.15 Script Injection via SVG
CVE-2026-75832 4.3 MEDIUM Grav API Plugin before 1.0.14 Authorization Bypass
CVE-2026-75835 4.3 MEDIUM Grav API Plugin before 1.0.14 Missing Authorization
CVE-2026-75833 4.2 MEDIUM Grav API Plugin Open Redirect via Backslash Bypass

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-79

V. Comments for CVE-2026-75828

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