CVE-2023-50265 — Bazarr manages and downloads subtitles

Bazarr manages and downloads subtitles. Prior to 1.3.1, the /api/swaggerui/static 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 i

01What is this vulnerability?

Bazarr manages and downloads subtitles. Prior to 1.3.1, the /api/swaggerui/static 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.

02Affected products

Vendor	Product	Versions
morpheus65535	bazarr	< 1.3.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-15T20:42:25.409Z
• Last modified: 2024-10-07T15:29:04.636Z

09References

• securitylab.github.com — https://securitylab.github.com/advisories/GHSL-2023-192_GHSL-2023-194_bazarr/
• github.com — https://github.com/morpheus65535/bazarr/commit/17add7fbb3ae1919a40d505470d499d46…
• github.com — https://github.com/morpheus65535/bazarr/releases/tag/v1.3.1