CVE-2021-21402

mediumpriority · attend · 64EPSS 0.793 · 100 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

3 exploits · PoC

Likely / severe?

79.3% (100th) EPSS

CVSS 4 · medium

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4–7.7

v2.04mediumAV:N/AC:L/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 3.1 · impact 4

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22US

exploits (3)

Public proof-of-concept and weaponised exploit code.

givemefivw/CVE-2021-21402CVE-2021-21402 Jellyfin任意文件读取 Wker脚本，可批量。PoC · poc_in_github
jiaocoll/CVE-2021-21402-JellyfinCVE-2021-21402-Jellyfin-任意文件读取PoC · poc_in_github
somatrasss/CVE-2021-21402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。PoC · poc_in_github

affected products (2)

Products and version ranges known to be affected.

jellyfin jellyfin≤ < 10.7.1enisa_euvdEU
jellyfin jellyfin< 10.7.1nvdUScpe:2.3:a:jellyfin:jellyfin:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-03-23modified 2026-06-17

references (10)

External citations — patches, advisories, analysis.

scry

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