CVE-2023-50264: Bazarr Arbitrary file read in /system/backup/download/ endpoint

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-12-15 · updated 2026-06-17
Weakness: CWE-22

Description

Bazarr manages and downloads subtitles. Prior to 1.3.1, Bazarr contains an arbitrary file read in /system/backup/download/ endpoint in bazarr/app/ui.py does not validate the user-controlled filename variable and uses it in the send_file function, which leads to an arbitrary file read on the system. This issue is fixed in version 1.3.1.

Affected products

morpheus65535 bazarr: before 1.3.1 — fixed in 1.3.1

How to fix

Upgrade to a fixed version: morpheus65535 bazarr 1.3.1. Check the vendor advisory for mitigations.

References

https://github.com/morpheus65535/bazarr/commit/17add7fbb3ae1919a40d505470d499d46df9ae6b
https://github.com/morpheus65535/bazarr/releases/tag/v1.3.1
https://securitylab.github.com/advisories/GHSL-2023-192_GHSL-2023-194_bazarr/
https://github.com/morpheus65535/bazarr/commit/17add7fbb3ae1919a40d505470d499d46df9ae6b
https://github.com/morpheus65535/bazarr/releases/tag/v1.3.1
https://securitylab.github.com/advisories/GHSL-2023-192_GHSL-2023-194_bazarr/

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