CVE-2025-59411: cubecart XSS — Exploit & Fix

Description

CubeCart is an ecommerce software solution. Prior to version 6.5.11, the contact form’s Enquiry field accepts raw HTML and that HTML is included verbatim in the email sent to the store admin. By submitting HTML in the Enquiry, the admin receives an email containing that HTML. This indicates user input is not being escaped or sanitized before being output in email (and possibly when re-rendering the form), leading to Cross-Site Scripting / HTML injection risk in email clients or admin UI. This issue has been patched in version 6.5.11.

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
cubecart	cubecart	< 6.5.11

References

Advisories & Patches

https://github.com/cubecart/v6/commit/299065bd4a8836782ce92f70988c730f130756db https://github.com/cubecart/v6/commit/48336c54532705873a8c4106208c2d596f128047 https://github.com/cubecart/v6/security/advisories/GHSA-5hg3-m3q3-v2p4 https://github.com/cubecart/v6/security/advisories/GHSA-5hg3-m3q3-v2p4

Exploits

https://github.com/cubecart/v6/security/advisories/GHSA-5hg3-m3q3-v2p4 https://github.com/cubecart/v6/security/advisories/GHSA-5hg3-m3q3-v2p4

Frequently Asked Questions

What is CVE-2025-59411? +

CubeCart is an ecommerce software solution. Prior to version 6.5.11, the contact form’s Enquiry field accepts raw HTML and that HTML is included verbatim in the email sent to the store admin. By submitting HTML in the Enquiry, the admin receives an email containing that HTML. This indicates user input is not being escaped or sanitized before being output in email (and possibly when re-rendering the form), leading to Cross-Site Scripting / HTML injection risk in email clients or admin UI. This issue has been patched in version 6.5.11. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-59411? +

CVE-2025-59411 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-2025-59411? +

CVE-2025-59411 affects products from cubecart, specifically: cubecart. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59411? +

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-2025-59411