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PII exposed in /metrics API endpoint

Moderate
smlx published GHSA-mx2f-vq5r-qvhw Sep 19, 2025

Package

No package listed

Affected versions

< eaf4338a223eddebdd59d0b44d44f7a66b423658

Patched versions

eaf4338a223eddebdd59d0b44d44f7a66b423658

Description

Impact

Email addresses of users were exposed in the labels of Prometheus metrics published on the unauthenticated /metrics endpoint of the API.

Patches

The issue was addressed in #129. The metrics endpoint is now authenticated.

This project is in prerelease development, so it does not currently have tags or versions available. Update to the latest version of the main branch for the fix.

In future, the labels will be updated to remove PII.

Workarounds

None.

References

n/a

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVE ID

No known CVE

Weaknesses

Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Learn more on MITRE.

Credits