FOSSBilling is a free, open-source billing and client management system. In versions 0.5.6 through 0.7.2, when a `ClientPasswordReset` record already exists for a client (from a previous unexpired reset request), subsequent calls to the `reset_password` guest API endpoint reuse the existing token instead of generating a new one. The 15-minute validity window is anchored to the first request's `created_at` timestamp, not the time of the most recent email. An attacker who obtained the original reset link remains able to use it even after the victim requests a new reset, because the original token is never invalidated or rotated. Version 0.8.0 patches the issue. Some workarounds are available. Configure a reverse proxy (e.g., Nginx, Apache, Cloudflare) to apply per-IP rate limiting to the `/client/reset-password` endpoint to minimize the window of opportunity, and/or manually clear expired `client_password_reset` records from the database after a client reports a suspected compromise.
Metrics
Affected Vendors & Products
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|---|---|
| Fossbilling |
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OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.
| Vendors | Products |
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| Fossbilling |
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References
History
Tue, 07 Jul 2026 00:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Fossbilling
Fossbilling fossbilling |
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| Vendors & Products |
Fossbilling
Fossbilling fossbilling |
Mon, 06 Jul 2026 23:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | FOSSBilling is a free, open-source billing and client management system. In versions 0.5.6 through 0.7.2, when a `ClientPasswordReset` record already exists for a client (from a previous unexpired reset request), subsequent calls to the `reset_password` guest API endpoint reuse the existing token instead of generating a new one. The 15-minute validity window is anchored to the first request's `created_at` timestamp, not the time of the most recent email. An attacker who obtained the original reset link remains able to use it even after the victim requests a new reset, because the original token is never invalidated or rotated. Version 0.8.0 patches the issue. Some workarounds are available. Configure a reverse proxy (e.g., Nginx, Apache, Cloudflare) to apply per-IP rate limiting to the `/client/reset-password` endpoint to minimize the window of opportunity, and/or manually clear expired `client_password_reset` records from the database after a client reports a suspected compromise. | |
| Title | FOSSBilling: Client password reset token reuse allows persistent account takeover | |
| Weaknesses | CWE-640 | |
| References |
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| Metrics |
cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-06T23:02:16.314Z
Reserved: 2026-06-09T20:16:59.648Z
Link: CVE-2026-53646
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-07-07T00:30:03Z