Administrator takeover via encoded upload path traversal
Published Jun 19, 2026 · Updated Jun 19, 2026
Path traversal in FileRise before 3.16.0 allows remote attackers with a valid shared-folder token to write arbitrary files via encoded filenames. FolderController validates the still-encoded name, but UploadModel::handleUpload later URL-decodes it and passes the reconstructed path to move_uploaded_file without a containment check. Possession of a valid, non-expired, upload-enabled link is required; traversal can overwrite users/users.txt to create an administrator account.
Summary
What happened
Path traversal in FileRise before 3.16.0 allows remote attackers with a valid shared-folder token to write arbitrary files via encoded filenames. FolderController validates the still-encoded name, but UploadModel::handleUpload later URL-decodes it and passes the reconstructed path to move_uploaded_file without a containment check. Possession of a valid, non-expired, upload-enabled link is required; traversal can overwrite users/users.txt to create an administrator account.
The record
- CVE
- CVE-2026-54414
- Published
- Jun 19, 2026
- Updated
- Jun 19, 2026
- Vendor
- error311
- Product
- FileRise
- Classifications
- CWE-434, CWE-22, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 19, 2026CVE publishedPublication date reported by the CVE source.
- Jun 19, 2026Record 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=0 <3.16.0
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
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Technologies
Your stack
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Your stack
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