nextcloud nextcloud_server 在web页面生成时对输入的转义处理不恰当（跨站脚本）
CVE编号
CVE-2021-32733利用情况
暂无补丁情况
N/A披露时间
2021-07-13漏洞描述
Nextcloud Text is a collaborative document editing application that uses Markdown. A cross-site scripting vulnerability is present in versions prior to 19.0.13, 20.0.11, and 21.0.3. The Nextcloud Text application shipped with Nextcloud server used a `text/html` Content-Type when serving files to users. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. As a workaround, use a browser that has support for Content-Security-Policy.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
|
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x4w... | |
| https://github.com/nextcloud/text/pull/1689 | |
| https://hackerone.com/reports/1241460 |
受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 应用 | nextcloud | nextcloud_server | * | Up to (excluding) 19.0.13 | |||||
| 运行在以下环境 | |||||||||
| 应用 | nextcloud | nextcloud_server | * | From (including) 20.0.0 | Up to (excluding) 20.0.11 | ||||
| 运行在以下环境 | |||||||||
| 应用 | nextcloud | nextcloud_server | * | From (including) 21.0.0 | Up to (excluding) 21.0.3 | ||||
- 攻击路径 网络
- 攻击复杂度 低
- 权限要求 无
- 影响范围 已更改
- 用户交互 需要
- 可用性 无
- 保密性 低
- 完整性 低
| CWE-ID | 漏洞类型 |
| CWE-79 | 在Web页面生成时对输入的转义处理不恰当（跨站脚本） |
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