CVE-2026-4103— Cross-Site Scripting via HTML Sanitization in WSO2 Publisher and Developer Portals Allows Malicious Script Execution
Quick assessment
Affected
WSO2 WSO2 API Control Plane
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.
这段文字描述了一个安全漏洞，主要涉及发布商门户（Publisher Portal）和开发者门户（Developer Portal）中HTML净化不足的问题。具体翻译如下： 中文翻译： 发布商门户和开发者门户中存在 HTML 净化不足的问题，导致不可信的用户输入未经验码或中和处理便被渲染。当查看受影响的 API 文档时，攻击者可借此注入并执行恶意 JavaScript。 若成功利用该漏洞，攻击者可在用户浏览 API 文档时，在其浏览器上下文中执行恶意脚本。任何拥有权限通过上述门户访问 API 文档的用户均可能受到影响
Possible ATT&CK Techniques 3 AI
T1195 · Supply Chain Compromise T1210 · Exploitation of Remote Services T1059.007 · JavaScript
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I. Basic Information for CVE-2026-4103
Vulnerability Information
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Vulnerability Title
Cross-Site Scripting via HTML Sanitization in WSO2 Publisher and Developer Portals Allows Malicious Script Execution
Source: CVE Program / CVE List V5
Vulnerability Description
Insufficient HTML sanitization in the Publisher Portal and Developer Portal allows untrusted user input to be rendered without proper encoding or neutralization. This enables the injection and execution of malicious JavaScript when affected API documents are viewed.
Successful exploitation may result in the execution of malicious scripts within the user's browser context when viewing API documentation. Users with permissions to access the API documentation through these portals may be impacted, potentially allowing attackers to perform actions on behalf of the user, depending on their session privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| WSO2 | WSO2 API Control Plane | 4.5.0 ~ 4.5.0.55 | - |
|
| WSO2 | WSO2 API Manager | 3.2.0 ~ 3.2.0.470 | - |
|
II. Public POCs for CVE-2026-4103
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-4103 (1)
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