Description
Label Studio through 1.23.0 fails to validate webhook URLs, allowing authenticated users to dispatch requests to internal services including RFC 1918 addresses and cloud metadata endpoints. Attackers can create webhooks targeting private networks and exfiltrate annotation data by enabling payload transmission in outbound requests.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| HumanSignal | label-studio | ≤ 1.23.0 | — |
References
- GitHub Issue #9801 issue-tracking
- https://github.com/HumanSignal/label-studio product
- webhooks/utils.py at 1.23.0 technical-description
- https://github.com/HumanSignal/label-studio/commit/2c1c1d6472153032af8ed399168f814bea854e3e patch
- VulnCheck Advisory: Label Studio through 1.23.0 SSRF via Unvalidated Webhook URL third-party-advisory