DTStack Taier Path Traversal Flaws

Path traversal in DTStack Taier 1.4.0's Chunk-Check Endpoint exposes the server's filesystem to remote unauthenticated attackers who can manipulate the Name parameter in FileChunkController.java to escape the intended upload directory. The Java Paths.get() function processes attacker-controlled input without sanitization, enabling directory traversal sequences to reference arbitrary files accessible to the Taier process. A public proof-of-concept exploit is available via GitHub issue #1203, and no exploitation confirmation from CISA KEV exists at time of analysis.

Path traversal in DTStack Taier 1.4.0 allows an authenticated administrative user to supply a crafted clusterName containing directory-escape sequences during cluster creation, causing FileUtils.deleteDirectory to operate on arbitrary filesystem paths outside the intended temp directory. The CVSS 4.0 score of 5.1 with PR:H reflects the constrained attack surface: only users with cluster management privileges can trigger the flaw. No public exploit code or CISA KEV listing exists at time of analysis.

Path traversal in DTStack Taier 1.4.0's UploadController allows privileged remote attackers to write files outside the intended upload directory by supplying a crafted filename containing sequences such as '../' or absolute paths. The commit diff confirms that `MultipartFile.getOriginalFilename()` output was concatenated directly into a filesystem path without any sanitization before the fix. The CVSS 4.0 PR:H rating constrains exploitation to authenticated high-privilege users; no public exploit code or CISA KEV listing exists at time of analysis.