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TI-2025-18951 Aliases CVE-2025-25297GHSA-m238-fmcw-wh58

Label Studio allows Server-Side Request Forgery in the S3 Storage Endpoint

Priority HIGH 76CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

Label Studio is an open source data labeling tool. Prior to version 1.16.0, Label Studio's S3 storage integration feature contains a Server-Side Request Forgery (SSRF) vulnerability in its endpoint configuration. When creating an S3 storage connection, the application allows users to specify a custom S3 endpoint URL via the s3_endpoint parameter. This endpoint URL is passed directly to the boto3 AWS SDK without proper validation or restrictions on the protocol or destination. The vulnerability allows an attacker to make the application send HTTP requests to arbitrary internal services by specifying them as the S3 endpoint. When the storage sync operation is triggered, the application attempts to make S3 API calls to the specified endpoint, effectively making HTTP requests to the target service and returning the response in error messages. This SSRF vulnerability enables attackers to bypass network segmentation and access internal services that should not be accessible from the external network. The vulnerability is particularly severe because error messages from failed requests contain the full response body, allowing data exfiltration from internal services. Version 1.16.0 contains a patch for the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00668 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed label-studio (HumanSignal): 1.16.0label-studio (PyPI): 1.16.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HumanSignallabel-studiobefore 1.16.01.16.0Patch availableCNA
—label-studio (PyPI)before 1.16.01.16.0Patch availableGHSA-m238-fmcw-wh58
  • label-studio VendorHumanSignal Affected before 1.16.0 Fixed in 1.16.0 Patch available CNA
  • label-studio (PyPI) Vendor— Affected before 1.16.0 Fixed in 1.16.0 Patch available GHSA-m238-fmcw-wh58

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:humansignal:label_studio:*:*:*:*:*:*:*:*before 1.16.0VulnerableHumanSignal
  • cpe:2.3:a:humansignal:label_studio:*:*:*:*:*:*:*:* Versions before 1.16.0 Vulnerable ·HumanSignal

Remediation

  • Fix · CNA label-studio (HumanSignal) Fixed in 1.16.0
  • Fix · GHSA-m238-fmcw-wh58 label-studio (PyPI) Fixed in 1.16.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-25297
  2. 2026-10-03 Alias added: GHSA-m238-fmcw-wh58

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2023-23482 Label Studio has Hardcoded Django `SECRET_KEY` that can be Abused to Forge Session Tokens CVSS 3.1CRITICAL 9.8
  • TI-2023-25457 Object Relational Mapper Leak Vulnerability in Filtering Task in Label Studio CVSS 3.1HIGH 7.5
  • TI-2026-17727 Label Studio vulnerable to full account takeover by chaining Stored XSS + IDOR in User Profile via custom_hotkeys field CVSS 4.0HIGH 8.6
  • TI-2025-30248 label-studio vulnerable to Cross-Site Scripting (Reflected) via the label_config parameter. CVSS 4.0HIGH 7.6
  • TI-2023-25455 Label Studio XSS Vulnerability on Avatar Upload CVSS 3.1HIGH 7.1
  • TI-2025-18950 Label Studio allows Cross-Site Scripting (XSS) via GET request to `/projects/upload-example` endpoint CVSS 3.1MEDIUM 6.1
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences