What is the CVSS score of CVE-2025-12635?

CVE-2025-12635 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Websphere Application Server are affected by CVE-2025-12635?

CVE-2025-12635 presents moderate security risk, a cross-site scripting vulnerability rated CVSS 5.4. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

How to fix or mitigate CVE-2025-12635?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Websphere Application Server CVE-2025-12635

EUVD-2025-201831 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-12-08 psirt@us.ibm.com

XSS IBM Websphere Application Server

5.4

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 17:54 euvd

EUVD-2025-201831

Analysis Generated

Mar 15, 2026 - 17:54 vuln.today

CVE Published

Dec 08, 2025 - 22:15 nvd

MEDIUM 5.4

DescriptionNVD

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.

Analysis

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

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CVE-2025-12635 vulnerability details – vuln.today

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