CVE-2026-4103

MEDIUM CVSS 3.1: 6.4 EPSS 0.18%
Updated Sep 18, 2026
Wso2
Parameter Value
CVSS 6.4 (MEDIUM)
Affected Versions 3.2.0 — 4.6.0.19
Fixed In 4.5.0.55
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Wso2
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 10

Configuration From (including) Up to (excluding)
Wso2 Wso2_Api_Control_Plane
cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:*
4.5.0 4.5.0.55
Wso2 Wso2_Api_Control_Plane
cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:*
4.6.0 4.6.0.19
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
3.2.0 3.2.0.470
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
3.2.1 3.2.1.89
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
4.1.0 4.1.0.254
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
4.2.0 4.2.0.194
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
4.3.0 4.3.0.105
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
4.4.0 4.4.0.69
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
4.5.0 4.5.0.54
Wso2 Wso2_Api_Manager
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
4.6.0 4.6.0.18