What is CVE-2025-12635?

CVE-2025-12635 is a medium-severity vulnerability in IBM Websphere Application Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-08.

How severe is CVE-2025-12635?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in IBM Websphere Application Server

CVE-2025-12635

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Ibm Websphere Application Server — versions 9.0, 8.5
Ibm Websphere_application_server
Ibm Websphere Application Server Liberty — versions 17.0.0.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-12635?: CVE-2025-12635 is a medium-severity vulnerability in IBM Websphere Application Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-08.
How severe is CVE-2025-12635?: Medium severity. CVSS v3 base score is 5.4 out of 10.