CVE-2025-59305: langfuse Access Control Flaw — Exploit

Description

Improper authorization in the background migration endpoints of Langfuse 3.1 before d67b317 allows any authenticated user to invoke migration control functions. This can lead to data corruption or denial of service through unauthorized access to TRPC endpoints such as backgroundMigrations.all, backgroundMigrations.status, and backgroundMigrations.retry.

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CVSS v3.1 Score

7.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Weakness Type (CWE)

CWE-285 CWE-285

Affected Products

Vendor	Product	Versions
langfuse	langfuse	3.1.0 — 3.109.0

References

Exploits

https://depthfirst.com/post/how-an-authorization-flaw-reveals-a-common-security-blind-spot-cve-2025-59305-case-study

Frequently Asked Questions

What is CVE-2025-59305? +

Improper authorization in the background migration endpoints of Langfuse 3.1 before d67b317 allows any authenticated user to invoke migration control functions. This can lead to data corruption or denial of service through unauthorized access to TRPC endpoints such as backgroundMigrations.all, backgroundMigrations.status, and backgroundMigrations.retry. It has a CVSS v3.1 base score of 7.6 (HIGH).

How severe is CVE-2025-59305? +

CVE-2025-59305 has a CVSS v3.1 score of 7.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-59305? +

CVE-2025-59305 affects products from langfuse, specifically: langfuse. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59305? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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