The authentication endpoint generates an error message that includes reflected data directly from the request without sufficient sanitization or encoding. This allows an attacker to inject malicious scripts that can be executed in the context of a victim's browser.

Successful exploitation enables an attacker to perform actions within the user's browser, such as redirecting the user to a malicious website, modifying the web page's user interface, or retrieving information. However, due to the httpOnly flag on session-related cookies, session hijacking or similar attacks are not possible.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
WSO2 WSO2 API Manager unaffected
Version Status Constraints
0 unknown < 3.2.0
3.2.0 affected < 3.2.0.480
3.2.1 affected < 3.2.1.99
4.1.0 affected < 4.1.0.265
4.2.0 affected < 4.2.0.205
4.3.0 affected < 4.3.0.117
4.4.0 affected < 4.4.0.80
4.5.0 affected < 4.5.0.65
4.6.0 affected < 4.6.0.29
4.7.0 affected < 4.7.0.1
WSO2 WSO2 API Control Plane unaffected
Version Status Constraints
0 unknown < 4.5.0
4.5.0 affected < 4.5.0.66
4.6.0 affected < 4.6.0.30
4.7.0 affected < 4.7.0.1
WSO2 WSO2 Identity Server unaffected
Version Status Constraints
0 unknown < 5.10.0
5.10.0 affected < 5.10.0.399
5.11.0 affected < 5.11.0.446
6.0.0 affected < 6.0.0.272
6.1.0 affected < 6.1.0.274
7.0.0 affected < 7.0.0.155
7.1.0 affected < 7.1.0.65
7.2.0 affected < 7.2.0.26

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4850/#solution

Workaround

No workaround given by the vendor.

References
Link Providers
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4850/ cve-icon cve-icon
History

Wed, 28 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Description The authentication endpoint generates an error message that includes reflected data directly from the request without sufficient sanitization or encoding. This allows an attacker to inject malicious scripts that can be executed in the context of a victim's browser. Successful exploitation enables an attacker to perform actions within the user's browser, such as redirecting the user to a malicious website, modifying the web page's user interface, or retrieving information. However, due to the httpOnly flag on session-related cookies, session hijacking or similar attacks are not possible.
Title Cross-Site Scripting via Authentication Endpoint Error Message in Multiple WSO2 Products
Weaknesses CWE-79
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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: WSO2

Published:

Updated: 2026-10-28T19:21:33.216Z

Reserved: 2026-06-10T08:38:33.407Z

Link: CVE-2026-11854

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-28T20:17:22.883

Modified: 2026-10-28T20:17:22.883

Link: CVE-2026-11854

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses