CVE-2021-21402— Unauthenticated Arbitrary File Access in Jellyfin
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I. Basic Information for CVE-2021-21402
Vulnerability Information
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Vulnerability Title
Unauthenticated Arbitrary File Access in Jellyfin
Source: NVD (National Vulnerability Database)
Vulnerability Description
Jellyfin is a Free Software Media System. In Jellyfin before version 10.7.1, with certain endpoints, well crafted requests will allow arbitrary file read from a Jellyfin server's file system. This issue is more prevalent when Windows is used as the host OS. Servers that are exposed to the public Internet are potentially at risk. This is fixed in version 10.7.1. As a workaround, users may be able to restrict some access by enforcing strict security permissions on their filesystem, however, it is recommended to update as soon as possible.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Jellyfin 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jellyfin是一个免费软件媒体系统。可让您控制媒体的管理和流式传输。它是专有Emby和Plex的替代产品，可以通过多个应用程序将专用服务器中的媒体提供给最终用户设备。 Jellyfin before version 10.7.1存在安全漏洞，该漏洞源于精心制作的请求将允许从Jellyfin服务器的文件系统读取任意文件。
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)
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Affected Products
II. Public POCs for CVE-2021-21402
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | CVE-2021-21402-Jellyfin-任意文件读取 | https://github.com/jiaocoll/CVE-2021-21402-Jellyfin | POC Details |
| 2 | 本项目涉及到的仅为安全研究和授权情况下使用，其使用人员有责任和义务遵守当地法律条规。 | https://github.com/somatrasss/CVE-2021-21402 | POC Details |
| 3 | CVE-2021-21402 Jellyfin任意文件读取 Wker脚本，可批量。 | https://github.com/givemefivw/CVE-2021-21402 | POC Details |
| 4 | Jellyfin before 10.7.0 is vulnerable to local file inclusion. This issue is more prevalent when Windows is used as the host OS. Servers exposed to public Internet are potentially at risk. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21402.yaml | POC Details |
| 5 | None | https://github.com/Threekiii/Awesome-POC/blob/master/Web%E5%BA%94%E7%94%A8%E6%BC%8F%E6%B4%9E/Jellyfin%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E8%AF%BB%E5%8F%96%E6%BC%8F%E6%B4%9E%20CVE-2021-21402.md | POC Details |
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7308 chars
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III. Intelligence Information for CVE-2021-21402
请登录查看更多情报信息。
- https://github.com/jellyfin/jellyfin/releases/tag/v10.7.1x_refsource_MISC
- https://github.com/jellyfin/jellyfin/security/advisories/GHSA-wg4c-c9g9-rxhxx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-21402
IV. Related Vulnerabilities
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Jellyfin: Potential SSRF + Arbitrary file read via LiveTV M3 - CVE-2026-35031
Jellyfin: Potential RCE via subtitle upload path traversal + - CVE-2025-31499
Jellyfin Vulnerable to Argument Injection in FFmpeg
Same vendor: jellyfin
- CVE-2026-35034
Jellyfin: Potential Application DoS from excessively large S - CVE-2026-35033
Jellyfin: Potential SSRF + Arbitrary file read via stream ar - CVE-2026-35032
Jellyfin: Potential SSRF + Arbitrary file read via LiveTV M3 - CVE-2026-35031
Jellyfin: Potential RCE via subtitle upload path traversal + - CVE-2026-31852
Jellyfin Possible Organization/Secret Compromise from danger
Same weakness: CWE-22
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V. Comments for CVE-2021-21402
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