CVE-2025-48483: freescout XSS — Exploit & Fix

Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.180, the application is vulnerable to Cross-Site Scripting (XSS) attacks due to incorrect input validation and sanitization of user-input data during mail signature sanitization. An attacker can inject arbitrary HTML code, including JavaScript scripts, into the page processed by the user's browser, allowing them to steal sensitive data, hijack user sessions, or conduct other malicious activities. Additionally, if an administrator accesses one of these emails with a modified signature, it could result in a subsequent Cross-Site Request Forgery (CSRF) vulnerability. This issue has been patched in version 1.8.180.

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

CWE-352 Cross-Site Request Forgery

Affected Products

Vendor	Product	Versions
freescout	freescout	< 1.8.180

References

Advisories & Patches

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-g2vq-qwx2-pc2m

Exploits

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-g2vq-qwx2-pc2m

Frequently Asked Questions

What is CVE-2025-48483? +

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.180, the application is vulnerable to Cross-Site Scripting (XSS) attacks due to incorrect input validation and sanitization of user-input data during mail signature sanitization. An attacker can inject arbitrary HTML code, including JavaScript scripts, into the page processed by the user's browser, allowing them to steal sensitive data, hijack user sessions, or conduct other malicious activities. Additionally, if an administrator accesses one of these emails with a modified signature, it could result in a subsequent Cross-Site Request Forgery (CSRF) vulnerability. This issue has been patched in version 1.8.180. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-48483? +

CVE-2025-48483 has a CVSS v3.1 score of 5.4 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-2025-48483? +

CVE-2025-48483 affects products from freescout, specifically: freescout. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-48483? +

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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