kkFileView vulnerabilities

kkFileView 4.2.0 and later is vulnerable to Server-Side Request Forgery in the /getCorsFile endpoint. The TrustHostFilter validates the first non-empty parameter in a fixed priority order, while the controller only reads and fetches urlPath, allowing bypass of the trust.host whitelist by supplying both urlPath (real target) and url (whitelisted decoy), with the response body echoed back to the attacker.

kkFileView 5.0.0 through 5.0.2 allows reflected XSS via the /onlinePreview endpoint. The OnlinePreviewController passes the user-controlled page and kkagent request parameters to FreeMarker templates without sanitization, and the templates insert these values into raw JavaScript contexts.

kkFileView prior to 5.0.1 has an unauthenticated POST /listFiles endpoint that passes the user-controlled path parameter to Files.newDirectoryStream without confinement to the demo directory, allowing directory enumeration outside the intended root.

kkFileView prior to 5.0.1 has an unauthenticated GET /addTask endpoint that is omitted from TrustHostFilter and TrustDirFilter, allowing FileConvertQueueTask to fetch an attacker-selected URL after FileHandlerService#getFileAttribute uses the fullfilename parameter to force an OFFICE, COMPRESS, or CAD type.