ZDF
Sign inSign up

Vulnerabilities

Vulnerability · 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

Published Apr 23, 2025 · catalog updated Apr 23, 2025 · Drupal Block Class

Check if you run it

No confirmed exploitation is on record for CVE-2025-3902. EPSS is 0.24%. Act only if a listed version of Drupal Block Class is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.24%
Remediation
Version ranges on file
Affected products
vendor Drupal Block Class 4.0.0 <4.0.1

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Drupal Block Class 4.0.0 <4.0.14.0.0 <4.0.1

How to fix CVE-2025-3902

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-3902. EPSS is 0.24%. Act only if a listed version of Drupal Block Class is installed.

Which versions are affected?

Compare what you have installed with Drupal Block Class 4.0.0 <4.0.1 4.0.0 <4.0.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.24%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Drupal security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 23, 2025 · EUVD

    Detected

    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.

  2. Apr 23, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-3902

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-3902

    30-day exploitation probability 0.2%

    first.org
  • EUVDVulnerability recordEUVD-2025-12162

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.