What is CVE-2025-3900?

CVE-2025-3900 is a medium-severity vulnerability in Colorbox Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-04-23.

How severe is CVE-2025-3900?

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

XSS in Colorbox Project

CVE-2025-3900

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Colorbox allows Cross-Site Scripting (XSS).This issue affects Colorbox: from 0.0.0 before 2.1.3.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-04-23 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.003 (15.6th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Colorbox Project
Drupal Colorbox — versions 0.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.drupal.org/sa-contrib-2025-041 (Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)

Frequently asked questions

What is CVE-2025-3900?: CVE-2025-3900 is a medium-severity vulnerability in Colorbox Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-04-23.
How severe is CVE-2025-3900?: Medium severity. CVSS v3 base score is 6.1 out of 10.