CVE-2026-53646

CVE-2026-53646 affects FOSSBilling 0.5.6–0.7.2, where a ClientPasswordReset record from a prior unexpired request causes subsequent reset_password calls to reuse the original token. The 15-minute validity window is tied to the first request’s created_at, not the latest email, allowing an attacker...

CVE-2026-53646

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 resetpassword guest API endpoint reuse the existing token instea...

CVE-2026-53645

CVE-2026-53645 affects FOSSBilling prior to 0.8.0. A low-privileged staff member with staff.create_and_edit_staff can call /api/admin/staff/permissions_update to modify their own permissions, bypassing RBAC and enabling persistent privilege escalation. Version 0.8.0 patches the issue. Workarounds...

CVE-2026-53645

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow a low-privileged staff account to grant arbitrary module permissions to itself through the admin API, resulting in persistent privilege escalation. A staff user that only has...

CVE-2026-53645 FOSSBilling's missing self-edit prevention in staff permission management allows persistent privilege escalation

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow a low-privileged staff account to grant arbitrary module permissions to itself through the admin API, resulting in persistent privilege escalation. A staff user that only has...

CVE-2026-53645 FOSSBilling's missing self-edit prevention in staff permission management allows persistent privilege escalation

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow a low-privileged staff account to grant arbitrary module permissions to itself through the admin API, resulting in persistent privilege escalation. A staff user that only has...

CVE-2026-53644

FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an active state e.g., suspended, canceled. The root cause is missing order-state...

CVE-2026-53644 FOSSBilling's missing order-state validation allows clients to read and reset API key secrets for non-active orders

FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an active state e.g., suspended, canceled. The root cause is missing order-state...

CVE-2026-53644

CVE-2026-53644 (FOSSBilling) : Versions 0.5.3–0.7.2 allow authenticated clients to read and reset API key service secrets for orders not in an active state due to missing order-state validation in two client API endpoints, despite an isActive() helper existing in the Serviceapikey module. The iss...

CVE-2026-53644 FOSSBilling's missing order-state validation allows clients to read and reset API key secrets for non-active orders

FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an active state e.g., suspended, canceled. The root cause is missing order-state...

CVE-2026-53643

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin API endpoints. The root cause is a combination of the canalwaysaccess module flag which grants all staff access to certain...

CVE-2026-53643

FOSSBilling (free/open-source billing and client management system) is affected in versions prior to 0.8.0. The vulnerability arises from a combination of a can_always_access module flag that grants broad access to certain modules and insufficient permission checks or unsafe parameter handling on...

CVE-2026-53643 FOSSBilling allows low-privileged staff accounts to perform unauthorized actions via admin API endpoints

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin API endpoints. The root cause is a combination of the canalwaysaccess module flag which grants all staff access to certain...

CVE-2026-53643 FOSSBilling allows low-privileged staff accounts to perform unauthorized actions via admin API endpoints

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin API endpoints. The root cause is a combination of the canalwaysaccess module flag which grants all staff access to certain...

CVE-2026-53642

FOSSBilling is a free, open-source billing and client management system. In versions 0.5.6 through 0.7.2, when the "Require Email Confirmation" setting is enabled, a logged-in client with an unverified email address emailapproved = 0 can access all client-area pages e.g. /client/balance,...

CVE-2026-53642 FOSSBilling: Unverified clients can access client-area pages when email confirmation is required

FOSSBilling is a free, open-source billing and client management system. In versions 0.5.6 through 0.7.2, when the "Require Email Confirmation" setting is enabled, a logged-in client with an unverified email address emailapproved = 0 can access all client-area pages e.g. /client/balance,...

CVE-2026-53641 FOSSBilling has stored XSS in client email views via unescaped content in JavaScript template literal

FOSSBilling is a free, open-source billing and client management system. Versions 0.6.0 through 0.7.2 have a stored cross-site scripting XSS vulnerability in the client-facing email history views of FOSSBilling. Email HTML content contenthtml is rendered into a JavaScript template literal using t...

CVE-2026-53641

FOSSBilling versions 0.6.0–0.7.2 contain a stored XSS vulnerability in the client email history views. Email HTML content is rendered into a JavaScript template literal via the |raw filter, bypassing output escaping, allowing an admin to inject JavaScript payloads that execute in a client’s brows...

CVE-2026-53640

CVE-2026-53640 (FOSSBilling) affects the FOSSBilling project prior to version 0.8.0, where low-privileged staff could read sensitive data via admin API endpoints that lack proper authorization checks on read operations. The issue contrasts with write endpoints that have fine-grained permissions, ...

CVE-2026-53640 FOSSBilling missing authorization checks on read-only admin API endpoints expose sensitive staff, client, and redirect data

FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, low-privileged staff accounts may read sensitive data via admin API endpoints that lack permission checks. While sibling write endpoints correctly enforce fine-grained permissions, the corresponding...