Cross-Site Scripting Vulnerability in Label Studio by HumanSignal
CVE-2025-25296

6.1MEDIUM

Key Information:

Vendor

Humansignal

Status
Label-studio
Vendor
CVE Published:
14 February 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-25296?

Label Studio, an open-source data labeling tool, improperly sanitizes user input in its /projects/upload-example endpoint prior to version 1.16.0. An attacker can exploit this flaw by crafting a malicious label_config query parameter containing inline HTML and JavaScript. This allows the execution of arbitrary scripts in the browser of any user who accesses a specially crafted URL. Although there is a Content Security Policy in place, it is set to 'report-only' mode, which does not prevent the execution of injected scripts. Consequently, this vulnerability can result in various malicious actions, including theft of sensitive data and session hijacking. Version 1.16.0 rectifies this vulnerability.

Affected Version(s)

label-studio < 1.16.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-25296-POC
Created by math-x-io

References

https://github.com/HumanSignal/label-studio/security/advi...
x_refsource_CONFIRM
https://github.com/HumanSignal/label-studio/commit/8cf695...
x_refsource_MISC

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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