{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-4103","assignerOrgId":"ed10eef1-636d-4fbe-9993-6890dfa878f8","state":"PUBLISHED","assignerShortName":"WSO2","dateReserved":"2026-03-13T06:07:54.085Z","datePublished":"2026-09-14T15:54:05.548Z","dateUpdated":"2026-09-14T19:22:59.838Z"},"containers":{"cna":{"providerMetadata":{"orgId":"ed10eef1-636d-4fbe-9993-6890dfa878f8","shortName":"WSO2","dateUpdated":"2026-09-14T15:54:05.548Z"},"title":"Cross-Site Scripting via HTML Sanitization in WSO2 Publisher and Developer Portals Allows Malicious Script Execution","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-22","descriptions":[{"lang":"en","value":"CAPEC-22 CAPEC-22: Cross-site Scripting"}]}],"affected":[{"vendor":"WSO2","product":"WSO2 API Control Plane","versions":[{"status":"affected","version":"4.5.0","lessThan":"4.5.0.55","versionType":"custom"},{"status":"affected","version":"4.6.0","lessThan":"4.6.0.19","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"WSO2","product":"WSO2 API Manager","versions":[{"status":"unknown","version":"0","lessThan":"3.2.0","versionType":"custom"},{"status":"affected","version":"3.2.0","lessThan":"3.2.0.470","versionType":"custom"},{"status":"affected","version":"3.2.1","lessThan":"3.2.1.89","versionType":"custom"},{"status":"affected","version":"4.1.0","lessThan":"4.1.0.254","versionType":"custom"},{"status":"affected","version":"4.2.0","lessThan":"4.2.0.194","versionType":"custom"},{"status":"affected","version":"4.3.0","lessThan":"4.3.0.105","versionType":"custom"},{"status":"affected","version":"4.4.0","lessThan":"4.4.0.69","versionType":"custom"},{"status":"affected","version":"4.5.0","lessThan":"4.5.0.54","versionType":"custom"},{"status":"affected","version":"4.6.0","lessThan":"4.6.0.18","versionType":"custom"}],"defaultStatus":"unaffected"}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5.0","versionEndExcluding":"4.5.0.55"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6.0","versionEndExcluding":"4.6.0.19"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.0","versionEndExcluding":"3.2.0.470"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.1","versionEndExcluding":"3.2.1.89"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1.0","versionEndExcluding":"4.1.0.254"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2.0","versionEndExcluding":"4.2.0.194"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3.0","versionEndExcluding":"4.3.0.105"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.0","versionEndExcluding":"4.4.0.69"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5.0","versionEndExcluding":"4.5.0.54"},{"vulnerable":true,"criteria":"cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6.0","versionEndExcluding":"4.6.0.18"}]}]}],"descriptions":[{"lang":"en","value":"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.\n\nSuccessful 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.","supportingMedia":[{"type":"text/html","base64":false,"value":"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.\n\nSuccessful 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."}]}],"references":[{"url":"https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-4844/","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":6.4,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N"}}],"solutions":[{"lang":"en","value":"Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-4844/#solution","supportingMedia":[{"type":"text/html","base64":false,"value":"<span style=\"background-color: transparent;\">Follow the instructions given on </span><a target=\"_blank\" rel=\"nofollow\" href=\"https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-4844/#solution\"><span style=\"background-color: transparent;\">https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-4844/#solution</span></a> <br>"}]}],"credits":[{"lang":"en","value":"San Gil from Security Office","type":"finder"}],"source":{"advisory":"WSO2-2026-4844","discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-4103","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-14T19:12:26.565275Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-14T19:22:59.838Z"}}]}}