CVE-2025-5173: Label studio ml HumanSignal Label-studio-ml-backend Deserialization Of Untrusted Vulnerability

MODERATE
Advisory Identifier: GHSA-55g9-6c2x-gf8q
Share
CVSS 5.3
CWE-502 CWE-20
Published
Advisory Summary

CVE-2025-5173 is a MODERATE (CVSS 5.3) humansignal label-studio-ml-backend deserialization of untrusted vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Label studio ml libraries in the PyPI ecosystem. The issue involves humansignal label-studio-ml-backend deserialization of untrusted data vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2025-5173 at a Glance

CVE Identifier CVE-2025-5173
GHSA Identifier GHSA-55g9-6c2x-gf8q
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Label studio ml
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2025-5173

To remediate this vulnerability, upgrade all affected Label studio ml dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

label-studio-ml fixed: Latest secure release 
pip install label-studio-ml>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show label-studio-ml

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-5173, inspect your installed packages using pip:

pip show label-studio-ml

Analyze the terminal output to locate any version of Label studio ml in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show label-studio-ml command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Label studio ml, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability has been found in HumanSignal label-studio-ml-backend up to 9fb7f4aa186612806af2becfb621f6ed8d9fdbaf and classified as problematic. Affected by this vulnerability is the function load of the file label-studio-ml-backend/label_studio_ml/examples/yolo/utils/neural_nets.py of the component PT File Handler. The manipulation of the argument path leads to deserialization. An attack has to be approached locally. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available.

CVE-2025-5173 Affected Label studio ml Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
label-studio-ml
pypi/label-studio-ml
PyPI
≤ 1.0.9

References

NVD — CVE-2025-5173 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-5173
Label studio ml Source Repository REPOSITORY
https://github.com/HumanSignal/label-studio-ml-backend/issues/765
Label studio ml Source Repository REPOSITORY
https://github.com/HumanSignal/label-studio-ml-backend
vuldb.com/ WEB
https://vuldb.com/?ctiid.310261
vuldb.com/ WEB
https://vuldb.com/?id.310261
vuldb.com/ WEB
https://vuldb.com/?submit.578126

Frequently Asked Questions

What is CVE-2025-5173?
CVE-2025-5173 is a security vulnerability in Label studio ml involving HumanSignal label-studio-ml-backend Deserialization of Untrusted Data vulnerability under CWE-502: Deserialization of Untrusted Data.
Which Label studio ml versions are affected?
Affected versions include releases prior to current release patches across affected packages: label-studio-ml.
What version fixes CVE-2025-5173?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is label-studio-ml affected?
Yes, label-studio-ml is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2025-5173?
CVE-2025-5173 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2025-5173?
CVE-2025-5173 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check PyPI dependencies for CVE-2025-5173?
Run the dependency tree command: 'pip show label-studio-ml'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-55g9-6c2x-gf8q",
  "modified" : "2025-06-06T15:37:46Z",
  "published" : "2025-05-26T09:30:44Z",
  "aliases" : [ "CVE-2025-5173" ],
  "summary" : "HumanSignal label-studio-ml-backend Deserialization of Untrusted Data vulnerability",
  "details" : "A vulnerability has been found in HumanSignal label-studio-ml-backend up to 9fb7f4aa186612806af2becfb621f6ed8d9fdbaf and classified as problematic. Affected by this vulnerability is the function load of the file label-studio-ml-backend/label_studio_ml/examples/yolo/utils/neural_nets.py of the component PT File Handler. The manipulation of the argument path leads to deserialization. An attack has to be approached locally. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "label-studio-ml"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-5173"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HumanSignal/label-studio-ml-backend/issues/765"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/HumanSignal/label-studio-ml-backend"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?ctiid.310261"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?id.310261"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?submit.578126"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-502" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-06T15:37:46Z",
    "nvd_published_at" : "2025-05-26T07:15:26Z"
  }
}