CVE-2021-21402CWE-22

Unauthenticated Arbitrary File Access in Jellyfin

High · published March 23, 2021

Patch now

High probability of exploitation

CVSS calls it high at 7.7. It sits in the 99.6th percentile for exploit probability.

CVSS v3.1
7.7
EPSS
79%
Percentile
99.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.79313 · 99.6th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2021-03-23T19:35Z
EPSS history
Timeline
  • 23 MAR 19:35Z
    Unauthenticated Arbitrary File Access in Jellyfin
    cvelistv5