CVE-2025-1647: Bootstrap

Medium severity, CVSS 5.6. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Bootstrap allows Cross-Site Scripting (XSS).This issue affects Bootstrap: from 3.4.1 before 4.0.0.

Affected products

• Bootstrap Bootstrap: from 3.4.1, before 4.0.0 (fixed in 4.0.0)

Published 2025-05-15. Last modified 2026-10-09.