Description
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.
Published: 2026-04-29
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4577/#solution

Tracking

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Advisories

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History

Fri, 01 May 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Wso2 identity Server
CPEs cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*
Vendors & Products Wso2 identity Server

Wed, 29 Apr 2026 08:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Reflected Cross-Site Scripting via Authentication Endpoint in WSO2 Identity Server
First Time appeared Wso2
Wso2 wso2 Identity Server
Weaknesses CWE-79
CPEs cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:*
Vendors & Products Wso2
Wso2 wso2 Identity Server
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Subscriptions

Wso2 Identity Server Wso2 Identity Server
cve-icon MITRE

Status: PUBLISHED

Assigner: WSO2

Published:

Updated: 2026-04-29T12:28:52.278Z

Reserved: 2025-09-16T04:58:57.289Z

Link: CVE-2025-10503

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-04-29T09:16:23.663

Modified: 2026-05-01T17:40:32.130

Link: CVE-2025-10503

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-29T09:30:07Z

Weaknesses