Arbitrary file deletion via unvalidated unlink path
Published Sep 30, 2021 · Updated Aug 4, 2024
Arbitrary file deletion in BaiCloud-cms 2.5.7 allows attackers to delete server files through the /user/ppsave.php endpoint. The handler compares a user-controlled image path only with the prior and default values, then passes an existing path directly to PHP's unlink function without validating its location. The public report does not establish an authentication gate; deletion is limited to files writable by the PHP process and can remove installation locks or web-root controls.
Summary
What happened
Arbitrary file deletion in BaiCloud-cms 2.5.7 allows attackers to delete server files through the /user/ppsave.php endpoint. The handler compares a user-controlled image path only with the prior and default values, then passes an existing path directly to PHP's unlink function without validating its location. The public report does not establish an authentication gate; deletion is limited to files writable by the PHP process and can remove installation locks or web-root controls.
The record
- CVE
- CVE-2021-41729
- Published
- Sep 30, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1485
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 30, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Upstream GitHub issue proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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