CVE-2021-21402

Unauthenticated Arbitrary File Access in Jellyfin

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.

Category

7.7
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 92.33% Top 5%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: jellyfin jellyfin
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2021-21402?
CVE-2021-21402 has been scored as a high severity vulnerability.
How to fix CVE-2021-21402?
To fix CVE-2021-21402, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21402 being actively exploited in the wild?
It is possible that CVE-2021-21402 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~92% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21402?
CVE-2021-21402 affects jellyfin jellyfin.
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