Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Bootstrap Site Alert allows Cross-Site Scripting (XSS).This issue affects Bootstrap Site Alert: from 0.0.0 before 1.13.0, from 3.0.0 before 3.0.4.
Conclusion & alert: CVE-2025-3901 is rated Moderate Risk (46.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.41%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-02 | 0.18% | 0.41% | +0.22% |
| 2 | 2026-02-17 | 0.05% | 0.18% | +0.13% |
| 3 | 2026-02-07 | — | 0.05% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.1 | MEDIUM |
|
2.8 | 2.7 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| bootstrap_site_alert_project | bootstrap_site_alert | < 1.13.0 | cpe:2.3:a:bootstrap_site_alert_project:bootstrap_site_alert:*:*:*:*:*:drupal:*:* |
| bootstrap_site_alert_project | bootstrap_site_alert | >= 3.0.0, < 3.0.4 | cpe:2.3:a:bootstrap_site_alert_project:bootstrap_site_alert:*:*:*:*:*:drupal:*:* |
| bootstrap_site_alert_project | bootstrap_site_alert | >= 8.x-1.0, < 8.x-1.13 | cpe:2.3:a:bootstrap_site_alert_project:bootstrap_site_alert:*:*:*:*:*:drupal:*:* |
| URL | Tags |
|---|---|
| https://www.drupal.org/sa-contrib-2025-042 | Vendor Advisory |