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CVE-2026-49276— Kirby: Self cross-site scripting (self-XSS) in the writer field

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，该漏洞源于在使用writer字段的任何blueprint中，允许将脚本链接作为链接或电子邮件链接的目标包含在writer mark组件中，导致在Panel中实现自跨站脚本攻击。

AI Predicted 6.1 Difficulty: Easy EPSS 0.43% · P35

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-2026-49276

Vulnerability Information
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Vulnerability Title
Kirby: Self cross-site scripting (self-XSS) in the writer field
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 using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. 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:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面属性中脚本转义处理不恰当
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，该漏洞源于在使用writer字段的任何blueprint中，允许将脚本链接作为链接或电子邮件链接的目标包含在writer mark组件中，导致在Panel中实现自跨站脚本攻击。
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-2026-49276

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III. Intelligence Information for CVE-2026-49276

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Vendor Advisories for CVE-2026-49276 (1)

Vendor Pages for CVE-2026-49276 (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-2026-54002 Kirby: Cross-site scripting (XSS) from incomplete HTML/XML sanitization in `Dom::sanitize(
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-83

V. Comments for CVE-2026-49276

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