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TI-2026-03553 Aliases CVE-2026-4103GHSA-wfvc-6jjf-4g5g

Cross-Site Scripting via HTML Sanitization in WSO2 Publisher and Developer Portals Allows Malicious Script Execution

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00301 22nd percentileScored 2026-11-07
Fix Fixed WSO2 API Control Plane (WSO2): 4.5.0.55, 4.6.0.19WSO2 API Manager (WSO2): 3.2.0.470, 3.2.1.89, 4.1.0.254 +5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WSO2WSO2 API Control Plane4.5.0 to before 4.5.0.55; 4.6.0 to before 4.6.0.194.5.0.55, 4.6.0.19Patch availableCNA
WSO2WSO2 API Manager3.2.0 to before 3.2.0.470; 3.2.1 to before 3.2.1.89; 4.1.0 to before 4.1.0.254; 4.2.0 to before 4.2.0.194; 4.3.0 to before 4.3.0.105; 4.4.0 to before 4.4.0.69; 4.5.0 to before 4.5.0.54; 4.6.0 to before 4.6.0.183.2.0.470, 3.2.1.89, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.69, 4.5.0.54, 4.6.0.18Patch availableCNA
  • WSO2 API Control Plane VendorWSO2 Affected 4.5.0 to before 4.5.0.55; 4.6.0 to before 4.6.0.19 Fixed in 4.5.0.55, 4.6.0.19 Patch available CNA
  • WSO2 API Manager VendorWSO2 Affected 3.2.0 to before 3.2.0.470; 3.2.1 to before 3.2.1.89; 4.1.0 to before 4.1.0.254; 4.2.0 to before 4.2.0.194; 4.3.0 to before 4.3.0.105; 4.4.0 to before 4.4.0.69; 4.5.0 to before 4.5.0.54; 4.6.0 to before 4.6.0.18 Fixed in 3.2.0.470, 3.2.1.89, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.69, 4.5.0.54, 4.6.0.18 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*——WSO2
  • cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* Versions — — ·WSO2

Remediation

  • Fix · CNA WSO2 API Control Plane (WSO2) Fixed in 4.5.0.55, 4.6.0.19
  • Fix · CNA WSO2 API Manager (WSO2) Fixed in 3.2.0.470, 3.2.1.89, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.69, 4.5.0.54, 4.6.0.18

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4103
  2. 2026-10-03 Alias added: GHSA-wfvc-6jjf-4g5g

References

Advisory 1

  • TI-2026-04755 Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-11928 Certain WSO2 products allow unrestricted file upload with resultant remote code execution. KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-18808 An issue was discovered in WSO2 Enterprise Integrator 6.4.0. CVSS 3.1MEDIUM 6.1
  • TI-2020-15069 The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0… CVSS 3.1CRITICAL 9.1
  • TI-2023-15163 A reflected cross-site scripting (XSS) vulnerability in /authenticationendpoint/login.do… CVSS 3.1MEDIUM 6.1
  • TI-2022-04130 WSO2 carbon-registry Advanced Search advancedSearchForm-ajaxprocessor.jsp cross site scripting CVSS 3.1MEDIUM 6.1
See all 186 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences