Arbitrary file write via unsanitized response filename
Published Nov 20, 2025 · Updated Nov 20, 2025
Path traversal in Dreampie Resty 1.3.1.SNAPSHOT and earlier allows remote attackers to write files via crafted HTTP responses. The HttpClient request() download branch extracts a filename from an untrusted Content-Disposition header and passes it directly to new File(fileOrDirectory, fileName) without removing path components. Exploitation requires control of a download response, such as through a malicious server or man-in-the-middle position, and permits writes wherever the application's operating-system account has access.
Summary
What happened
Path traversal in Dreampie Resty 1.3.1.SNAPSHOT and earlier allows remote attackers to write files via crafted HTTP responses. The HttpClient request() download branch extracts a filename from an untrusted Content-Disposition header and passes it directly to new File(fileOrDirectory, fileName) without removing path components. Exploitation requires control of a download response, such as through a malicious server or man-in-the-middle position, and permits writes wherever the application's operating-system account has access.
The record
- CVE
- CVE-2025-13435
- Published
- Nov 20, 2025
- Updated
- Nov 20, 2025
- Vendor
- Dreampie
- Product
- Resty
- Classifications
- CWE-22, T1105
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 20, 2025CVE publishedPublication date reported by the CVE source.
- Nov 20, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.3.1.SNAPSHOT
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Resty Path Traversal proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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