CVE-2026-53646 (GCVE-0-2026-53646)

Vulnerability from cvelistv5 – Published: 2026-07-06 22:58 – Updated: 2026-07-07 13:56
VLAI
Title
FOSSBilling: Client password reset token reuse allows persistent account takeover
Summary
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.
Severity
7.7 (High)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-07 13:55 UTC
CWE
  • CWE-640 - Weak Password Recovery Mechanism for Forgotten Password
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7646 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
FOSSBilling FOSSBilling Affected: >= 0.5.6, < 0.8.0
guessed Create a notification for this product.
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