Improper Authorization Vulnerability in Langfuse Product by Langfuse

CVE-2025-59305

What is CVE-2025-59305?

CVE-2025-59305 is a significant vulnerability identified in the Langfuse product by Langfuse, specifically affecting version 3.1 prior to commit d67b317. This vulnerability arises from improper authorization in the background migration endpoints, allowing any authenticated user to invoke crucial migration control functions. The nature of this flaw enables unauthorized access to functions like backgroundMigrations.all, backgroundMigrations.status, and backgroundMigrations.retry, which can lead to potential data corruption or service disruption. Such access could allow malefactors to manipulate migration processes, which are vital for managing data integrity and continuity within the organization’s operations.

The ramifications of this vulnerability are particularly concerning given that organizations rely heavily on data migration functionalities for proper system maintenance and upgrades. If exploited, this vulnerability could severely disrupt normal operation, leading to extensive downtime and potential data loss, thus affecting an organization’s overall performance and reputation.

Potential impact of CVE-2025-59305

1. Data Corruption: Unauthorized users could manipulate migration functions, resulting in the degradation or alteration of critical organizational data, which could jeopardize data integrity and usability.

2. Denial of Service: Exploiting this vulnerability could lead to a denial of service, as unauthorized access may allow individuals to disrupt migration processes, leading to system outages and impacting business continuity.

3. Operational Risks: The ability for any authenticated user to invoke migration controls introduces significant operational risks, as malicious actions could necessitate extensive recovery efforts, diverting resources and attention from core business functions.

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References