CVE-2025-3902: block class XSS — Fix

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Block Class allows Cross-Site Scripting (XSS).This issue affects Block Class: from 4.0.0 before 4.0.1.

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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
four_kitchens	block_class	4.0.0 — 4.0.1

References

Advisories & Patches

https://www.drupal.org/sa-contrib-2025-043

Frequently Asked Questions

What is CVE-2025-3902? +

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Block Class allows Cross-Site Scripting (XSS).This issue affects Block Class: from 4.0.0 before 4.0.1. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-3902? +

CVE-2025-3902 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-2025-3902? +

CVE-2025-3902 affects products from four_kitchens, specifically: block_class. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-3902? +

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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