What is CVE-2025-3902?

CVE-2025-3902 is a medium-severity vulnerability in Drupal Block Class, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-04-23.

How severe is CVE-2025-3902?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Drupal Block Class

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (14.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Drupal Block Class — versions 4.0.0
Four_kitchens Block_class

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

mlhess@drupal.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-3902?: CVE-2025-3902 is a medium-severity vulnerability in Drupal Block Class, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-04-23.
How severe is CVE-2025-3902?: Medium severity. CVSS v3 base score is 6.1 out of 10.