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CVE-2026-54002— Kirby: Cross-site scripting (XSS) from incomplete HTML/XML sanitization in `Dom::sanitize()`

Quick assessment

Affected
getkirby kirby
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.

getkirby Kirby是getkirby个人开发者开源的一套基于文件的内容管理系统。 getkirby kirby 4.9.4之前版本和5.4.4之前版本存在跨站脚本漏洞，该漏洞源于对Dom::sanitize()等函数处理不受信任输入时清理不当，可能导致恶意标记作为未知HTML或XML标签的子元素通过，造成存储型跨站脚本攻击。

AI Predicted 8.5 Difficulty: Easy EPSS 0.55% · P44

Affected Version Matrix 2

VendorProduct Version RangeStatus
getkirby kirby < 4.9.4 affected
>= 5.0.0, < 5.4.4 affected
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I. Basic Information for CVE-2026-54002

Vulnerability Information
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Vulnerability Title
Kirby: Cross-site scripting (XSS) from incomplete HTML/XML sanitization in `Dom::sanitize()`
Source: CVE Program / CVE List V5
Vulnerability Description
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites and plugins that use the writer or list fields or call Dom::sanitize(), Sane::sanitize(), Sane::Html::sanitize(), Sane::Svg::sanitize(), Sane::Xml::sanitize(), Sane::sanitizeFile(), or file sanitizeContents() with untrusted input allow malicious markup injected as children of an unknown HTML or XML tag to pass through Dom::sanitize() without being correctly sanitized, causing stored cross-site scripting. This issue is fixed in versions 4.9.4 and 5.4.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA: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
getkirby kirby 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
getkirby Kirby是getkirby个人开发者开源的一套基于文件的内容管理系统。 getkirby kirby 4.9.4之前版本和5.4.4之前版本存在跨站脚本漏洞，该漏洞源于对Dom::sanitize()等函数处理不受信任输入时清理不当，可能导致恶意标记作为未知HTML或XML标签的子元素通过，造成存储型跨站脚本攻击。
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
getkirby kirby < 4.9.4 -

II. Public POCs for CVE-2026-54002

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III. Intelligence Information for CVE-2026-54002

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Patches & Fixes for CVE-2026-54002 (4)

Vendor Advisories for CVE-2026-54002 (1)

Vendor Pages for CVE-2026-54002 (2)

Same Patch Batch · getkirby · 2026-07-09 · 7 CVEs total

CVE-2026-54004 Kirby: Access to files of top-level drafts is not protected by permissions
CVE-2026-54005 Kirby: `pages.access` permission is not checked in the `site/find` REST API route
CVE-2026-54003 Kirby: External Initialization of the Panel on reverse proxy setups with the `Forwarded` h
CVE-2026-49276 Kirby: Self cross-site scripting (self-XSS) in the writer field
CVE-2026-49274 Kirby: `pages.access` permission is not checked in the pages picker for parent pages
CVE-2026-50188 Kirby: Request header injection in `Http\Remote`

IV. Related Vulnerabilities

Same product: kirby
Same vendor: getkirby
Same weakness: CWE-79

V. Comments for CVE-2026-54002

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