CVE-2025-51966: utools XSS — Exploit

Description

A cross-site scripting (XSS) vulnerability exists in the PDF preview functionality of uTools thru 7.1.1. When a user previews a specially crafted PDF file, embedded JavaScript code executes within the application's privileged context, potentially allowing attackers to steal sensitive data or perform unauthorized actions.

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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
u-tools	utools	< 7.1.1

References

Exploits

https://t1sts.github.io/2025/05/27/uTools-has-an-XSS-vulnerability/ https://t1sts.github.io/2025/09/01/CVE-2025-51966/

Frequently Asked Questions

What is CVE-2025-51966? +

A cross-site scripting (XSS) vulnerability exists in the PDF preview functionality of uTools thru 7.1.1. When a user previews a specially crafted PDF file, embedded JavaScript code executes within the application's privileged context, potentially allowing attackers to steal sensitive data or perform unauthorized actions. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-51966? +

CVE-2025-51966 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-2025-51966? +

CVE-2025-51966 affects products from u-tools, specifically: utools. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-51966? +

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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CVE-2025-51966