CVE-2025-10503 MEDIUM

CVE-2025-10503: Reflected Cross-Site Scripting via Authentication Endpoint in WSO2 Identity Server

Vendor Wso2
Product WSO2 Identity Server
Weakness CWE-79 · XSS
Published April 29, 2026
Last update April 29, 2026

CVSS base score

6.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The authentication endpoint accepts user-supplied input without enforcing expected validation constraints, leading to a lack of proper output encoding. This allows for the injection of malicious JavaScript payloads, enabling reflected cross-site scripting. An attacker can leverage this vulnerability to redirect the user's browser to a malicious website, modify the user interface of the web page, retrieve information from the browser, or cause other harmful actions. However, due to the protection of session-related cookies with the httpOnly flag, session hijacking is not possible.

Key dates

02Disclosure timeline

April 29, 2026 CVE published
April 29, 2026 Record updated

Related vulnerabilities

04Related CVE