CVE-2023-48302— Nextcloud Server vulnerable to Self XSS when pasting HTML into Text app with Ctrl+Shift+V
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I. Basic Information for CVE-2023-48302
Vulnerability Information
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Vulnerability Title
Nextcloud Server vulnerable to Self XSS when pasting HTML into Text app with Ctrl+Shift+V
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and Nextcloud Enterprise Server, when a user is tricked into copy pasting HTML code without markup (Ctrl+Shift+V) the markup will actually render. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.13, 26.0.8, and 27.1.3 contain a fix for this issue. As a workaround, disable app text.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Server存在安全漏洞，该漏洞源于允许攻击者诱骗用户将HTML代码粘贴到Text app，从而触发跨站脚本（XSS）漏洞。受影响的产品和版本：Nextcloud Server 25.0.13之前的25.0.0版本，26.0.8之前的26.0.0版本，27.1.3之前的27.0.0版本；Nextccloud Enterprise Server 25.0.13之前的25.0.0版本，26.0.
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 |
|---|---|---|---|---|
| nextcloud | security-advisories | >= 25.0.0, < 25.0.13 | - |
II. Public POCs for CVE-2023-48302
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|---|
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- https://hackerone.com/reports/2211561x_refsource_MISC
- https://github.com/nextcloud/text/pull/4877x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2023-48302
Same Patch Batch · nextcloud · 2023-11-21 · 8 CVEs total
| CVE-2023-48239 | 8.5 HIGH | Nextcloud Server users can make external storage mount points inaccessible for other users |
| CVE-2023-48306 | 5.0 MEDIUM | Nextcloud Server DNS pin middleware can be tricked into DNS rebinding allowing SSRF |
| CVE-2023-48304 | 4.3 MEDIUM | Nextcloud Server vulnerable to attacker enabling/disabling birthday calendar for any user |
| CVE-2023-48305 | 4.2 MEDIUM | Nextcloud Server user_ldap app logs user passwords in the log file on level debug |
| CVE-2023-48307 | 3.5 LOW | Nextcloud Mail app vulnerable to Server-Side Request Forgery |
| CVE-2023-48301 | 3.5 LOW | Nextcloud Server HTML injection in search UI when selecting a circle with HTML in the disp |
| CVE-2023-48303 | 2.4 LOW | Nextcloud Server admins can change authentication details of user configured external stor |
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