CVE-2025-47783: label studio XSS — Exploit & Fix

Description

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. The vulnerability is reproducible when sending a properly formatted request to the `POST /projects/upload-example/` endpoint. In the source code, the vulnerability is located at `label_studio/projects/views.py`. Version 1.18.0 contains a patch for the issue.

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CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
humansignal	label_studio	< 1.18.0

References

Advisories & Patches

https://github.com/HumanSignal/label-studio/security/advisories/GHSA-8jhr-wpcm-hh4h

Exploits

https://github.com/HumanSignal/label-studio/security/advisories/GHSA-8jhr-wpcm-hh4h

Frequently Asked Questions

What is CVE-2025-47783? +

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. The vulnerability is reproducible when sending a properly formatted request to the `POST /projects/upload-example/` endpoint. In the source code, the vulnerability is located at `label_studio/projects/views.py`. Version 1.18.0 contains a patch for the issue. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-47783? +

CVE-2025-47783 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-47783? +

CVE-2025-47783 affects products from humansignal, specifically: label_studio. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-47783? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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