FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.1, downloadable product files are stored using a deterministic filename-derived path. When an administrator uploads a file for a downloadable product, FOSSBilling stores the file as `md5(<original filename>)` under the uploads directory. Because the stored path depends only on the client-supplied filename, two different downloadable products, or product/order files, uploaded with the same original filename will resolve to the same stored file path. A later upload can overwrite an earlier upload, causing customers or administrators downloading the earlier product to receive the later file instead. Version 0.8.1 patches the issue. Some workarounds are available. Restrict the `servicedownloadable.manage` permission to fully trusted administrators only. As an operational mitigation, ensure downloadable product files use unique filenames before upload. This reduces accidental collisions but does not fully address the underlying issue.
Advisories
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Fixes
Solution
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Workaround
No workaround given by the vendor.
References
History
Tue, 07 Jul 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Tue, 07 Jul 2026 00:45:00 +0000
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| First Time appeared |
Fossbilling
Fossbilling fossbilling |
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| Vendors & Products |
Fossbilling
Fossbilling fossbilling |
Mon, 06 Jul 2026 23:45:00 +0000
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| Description | FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.1, downloadable product files are stored using a deterministic filename-derived path. When an administrator uploads a file for a downloadable product, FOSSBilling stores the file as `md5(<original filename>)` under the uploads directory. Because the stored path depends only on the client-supplied filename, two different downloadable products, or product/order files, uploaded with the same original filename will resolve to the same stored file path. A later upload can overwrite an earlier upload, causing customers or administrators downloading the earlier product to receive the later file instead. Version 0.8.1 patches the issue. Some workarounds are available. Restrict the `servicedownloadable.manage` permission to fully trusted administrators only. As an operational mitigation, ensure downloadable product files use unique filenames before upload. This reduces accidental collisions but does not fully address the underlying issue. | |
| Title | FOSSBilling: Downloadable product files can be overwritten through filename collisions | |
| Weaknesses | CWE-668 CWE-73 |
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| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-07T13:58:05.740Z
Reserved: 2026-06-09T20:50:36.876Z
Link: CVE-2026-53648
Updated: 2026-07-07T13:58:01.007Z
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OpenCVE Enrichment
Updated: 2026-07-07T17:15:15Z