Description
Insufficient HTML sanitization in the Publisher Portal and Developer Portal allows untrusted user input to be rendered without proper encoding or neutralization. This enables the injection and execution of malicious JavaScript when affected API documents are viewed.

Successful exploitation may result in the execution of malicious scripts within the user's browser context when viewing API documentation. Users with permissions to access the API documentation through these portals may be impacted, potentially allowing attackers to perform actions on behalf of the user, depending on their session privileges.
Published: 2026-09-14
Score: 6.4 Medium
EPSS: n/a
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/WSO2-2026-4844/#solution

Tracking

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Advisories

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History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description Insufficient HTML sanitization in the Publisher Portal and Developer Portal allows untrusted user input to be rendered without proper encoding or neutralization. This enables the injection and execution of malicious JavaScript when affected API documents are viewed. Successful exploitation may result in the execution of malicious scripts within the user's browser context when viewing API documentation. Users with permissions to access the API documentation through these portals may be impacted, potentially allowing attackers to perform actions on behalf of the user, depending on their session privileges.
Title Cross-Site Scripting via HTML Sanitization in WSO2 Publisher and Developer Portals Allows Malicious Script Execution
First Time appeared Wso2
Wso2 wso2 Api Control Plane
Wso2 wso2 Api Manager
Weaknesses CWE-79
CPEs cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
Vendors & Products Wso2
Wso2 wso2 Api Control Plane
Wso2 wso2 Api Manager
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Subscriptions

Wso2 Wso2 Api Control Plane Wso2 Api Manager
cve-icon MITRE

Status: PUBLISHED

Assigner: WSO2

Published:

Updated: 2026-09-14T19:22:59.838Z

Reserved: 2026-03-13T06:07:54.085Z

Link: CVE-2026-4103

cve-icon Vulnrichment

Updated: 2026-09-14T19:15:11.374Z

cve-icon NVD

Status : Received

Published: 2026-09-14T16:17:11.710

Modified: 2026-09-14T20:16:44.490

Link: CVE-2026-4103

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses