CVE-2025-12635: IBM WebSphere Application Server

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

IBM WebSphere Application Server 8.5, 9.0 and IBM WebSphere Application Server Liberty 17.0.0.3 through 25.0.0.12 are affected by cross-site scripting due to improper validation of user-supplied input. An attacker could exploit this vulnerability by using a specially crafted URL to redirect the user to a malicious site.

Affected products

• IBM WebSphere Application Server: from 8.5, before 8.5.5.29 (fixed in 8.5.5.29); from 9.0, before 9.0.5.27 (fixed in 9.0.5.27); from 17.0.0.3, before 26.0.0.1 (fixed in 26.0.0.1)

Published 2025-12-08. Last modified 2026-10-07.