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GHSA-8xcj-9hfr-fh9j

MediumCVSS 5.3 / 10
Published Sep 22, 2026·Last modified Sep 22, 2026
Affected Components(1)
npm logounleash-server
< 8.0.3
Description

Summary

The clone-feature endpoint supports copying features across projects, but it does not verify that the caller can access the source project. A user with create permissions in one project can clone a feature from another project they cannot read and then inspect the copied configuration.

This vulnerability cannot be confirmed without Enterprise access. Report is based on a circumstantial evidence in the open-source repository.

Details

src/lib/features/feature-toggle/feature-toggle-service.ts implements cloneFeatureToggle. This operation needs authorization for both sides: permission to read/copy the source feature and permission to create the destination feature.

The clone path validates permissions against the destination project, but not against the source project that owns featureName. Because feature names are globally unique, a caller can reference a feature outside projects they can access.

PoC

  1. Create or identify two projects: P1 with a private or restricted feature named secret-feature, and P2 where the attacker has clone/create permissions.
  2. Authenticate as the attacker.
  3. Send:
POST /api/admin/projects/P2/features/secret-feature/clone
Content-Type: application/json

{ "name": "secret-feature-copy" }
  1. Open P2 and inspect secret-feature-copy. Verify if strategy parameters, constraints, variants, and variant payloads from the source feature have been copied.

Impact

Users with permissions on one project can disclose feature configuration from another project if they know or guess the source feature name. Feature names could be available in more public applications that have a common SDK access to multiple projects.

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Risk Scores
Base Score
5.3

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
1.3

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.30%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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