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CVE-2026-45011— Apostrophe has stored XSS via javascript: URL in Image Widget Link

Quick assessment

Affected
apostrophecms apostrophe
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.

apostrophecms是Apostrophecms公司开源的一个内容管理系统。 ApostropheCMS 4.29.0版本存在安全漏洞，该漏洞源于图片widget功能存在存储型跨站脚本漏洞，可能导致具有Editor角色的用户配置javascript: URL有效载荷，当管理员或访客点击受影响的图片或链接时，任意JavaScript会在受害者浏览器中执行。

CVSS 7.3 · High EPSS 0.37% · P28

Affected Version Matrix 1

VendorProduct Version RangeStatus
apostrophecms apostrophe = 4.29.0 affected
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I. Basic Information for CVE-2026-45011

Vulnerability Information
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Vulnerability Title
Apostrophe has stored XSS via javascript: URL in Image Widget Link
Source: CVE Program / CVE List V5
Vulnerability Description
ApostropheCMS is an open-source Node.js content management system. Version 4.29.0 has a stored cross-site scripting vulnerability in the image widget functionality. A user with the Editor role can configure an image widget link to use a javascript: URL payload. Because editors have permission to publish pages, the malicious widget can be published to the live site. When another user, including an administrator or public visitor, clicks the affected image/link, arbitrary JavaScript executes in the victim’s browser. As of time of publication, no known patched versions are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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
ApostropheCMS 输出处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
apostrophecms是Apostrophecms公司开源的一个内容管理系统。 ApostropheCMS 4.29.0版本存在安全漏洞，该漏洞源于图片widget功能存在存储型跨站脚本漏洞，可能导致具有Editor角色的用户配置javascript: URL有效载荷，当管理员或访客点击受影响的图片或链接时，任意JavaScript会在受害者浏览器中执行。
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
apostrophecms apostrophe = 4.29.0 -

II. Public POCs for CVE-2026-45011

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6131 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
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III. Intelligence Information for CVE-2026-45011

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Vendor Advisories for CVE-2026-45011 (1)

Vendor Pages for CVE-2026-45011 (1)

Same Patch Batch · apostrophecms · 2026-06-12 · 10 CVEs total

CVE-2026-44990 9.3 CRITICAL Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`
CVE-2026-53609 9.1 CRITICAL Apostrophe has Server-Side Prototype Pollution in apos.util.set via patch operators that l
CVE-2026-53608 8.7 HIGH @apostrophecms/seo Vulnerable to Stored XSS via Unsanitized Google Analytics / GTM ID Inje
CVE-2026-45013 8.1 HIGH Apostrophe has a Weak Password Recovery Mechanism for Forgotten Password and Improper Inpu
CVE-2026-45012 7.6 HIGH Apostrophe has authenticated SSRF in rich-text widget import via @apostrophecms/area/valid
CVE-2026-42853 6.5 MEDIUM @apostrophecms/cli: Command Injection in apos create via Unsanitized Password Input
CVE-2026-53606 5.4 MEDIUM sanitize-html has an incomplete URI scheme validation that allows javascript: URIs through
CVE-2026-53607 3.7 LOW @apostrophecms/file pretty-URL Vulnerable to Unauthenticated SSRF via Host header
CVE-2026-45014 Apostrophe Vulnerable to Stored Cross-Site Scripting via Unsanitized User Display Name in

IV. Related Vulnerabilities

Same product: apostrophe
Same vendor: apostrophecms
Same weakness: CWE-79

V. Comments for CVE-2026-45011

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