FO
Product
FOSSBilling
by FOSSBilling · last CVE Oct 19, 2026
42
CVEs
0
On KEV
10.0
Max CVSS
3
New 30D
Severity mix
Critical 6High 13Medium 20Low 3
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-27604
10.0
1%
Jun 23
FOSSBilling: Improper API Role Validation (system) Enables Unauthenticated Access to Privileged Admin Functions
Affected: >= 0.5.4, < 0.8.0
CVE-2023-4005
9.8
0%
Jul 31
Insufficient Session Expiration in fossbilling/fossbilling
Affected: before 0.5.5
CVE-2023-3490
9.8
1%
Jun 30
SQL Injection in fossbilling/fossbilling
Affected: before 0.5.3
CVE-2026-28496
9.4
2%
Jun 23
FOSSBilling: Server-side template injection in Twig template rendering enables information disclosure and RCE
Affected: < 0.8.0
CVE-2026-33543
9.3
0%
Jun 24
FOSSBilling: Authentication bypass allows unauthenticated administrator creation
Affected: < 0.8.0
CVE-2026-42341
9.2
0%
Jul 6
FOSSBilling has an unauthenticated payment bypass via IPN callback forgery
Affected: >= 0.6.0, < 0.8.0
CVE-2026-43921
8.9
0%
Jul 6
FOSSBilling vulnerable to arbitrary PHP code injection via unescaped config serialization
Affected: >= 0.6.10, < 0.8.0
CVE-2023-3491
8.8
1%
Jun 30
Unrestricted Upload of File with Dangerous Type in fossbilling/fossbilling
Affected: before 0.5.3
CVE-2026-53643
8.7
0%
Jul 6
FOSSBilling allows low-privileged staff accounts to perform unauthorized actions via admin API endpoints
Affected: < 0.8.0
CVE-2026-43918
8.7
0%
Jul 6
Suspended or inactive FOSSBilling accounts can retain or regain access through existing sessions, API tokens, and password reset flows
Affected: < 0.8.0
CVE-2026-53644
8.6
0%
Jul 6
FOSSBilling's missing order-state validation allows clients to read and reset API key secrets for non-active orders
Affected: >= 0.5.3, < 0.8.0
CVE-2026-53645
8.5
0%
Jul 6
FOSSBilling's missing self-edit prevention in staff permission management allows persistent privilege escalation
Affected: < 0.8.0
CVE-2023-3493
8.0
1%
Jun 30
Improper Neutralization of Formula Elements in a CSV File in fossbilling/fossbilling
Affected: before 0.5.3
CVE-2026-53646
7.7
0%
Jul 6
FOSSBilling: Client password reset token reuse allows persistent account takeover
Affected: >= 0.5.6, < 0.8.0
CVE-2026-42331
7.7
0%
Jul 6
FOSSBilling missing authorization in guest Invoice API endpoints
Affected: < 0.8.0
CVE-2023-3230
7.5
0%
Jun 14
Missing Authorization in fossbilling/fossbilling
Affected: before 0.5.0
CVE-2023-3393
7.2
1%
Jun 23
Code Injection in fossbilling/fossbilling
Affected: before 0.5.1
CVE-2026-27708
7.1
0%
Jun 24
FOSSBilling: IDOR in Servicecustom Client API allows cross-client data access
Affected: < 0.8.0
CVE-2026-23513
7.1
0%
Jun 23
FOSSBilling: Broken Authorization in Client Transaction and Order Listings
Affected: < 0.8.0
CVE-2026-111056
6.9
0%
Oct 19
FOSSBilling: Unauthenticated client account enumeration via guest signup endpoint
Affected: >= 0.1.0, < 0.8.7
CVE-2026-111053
6.9
0%
Oct 19
FOSSBilling: Unauthenticated attacker can probe existence of arbitrary files via guest/system/template_exists
Affected: >= 0.1.0, < 0.8.7
CVE-2026-53647
6.9
1%
Jul 6
FOSSBilling vulnerable to unauthenticated API key configuration disclosure via guest Serviceapikey get_info endpoint
Affected: >= 0.5.3, < 0.8.0
CVE-2026-43927
6.9
0%
Jul 6
FOSSBilling has race condition in cart checkout that bypasses promo code usage limits
Affected: < 0.8.0
CVE-2026-43925
6.9
0%
Jul 6
FOSSBilling: Mass assignment of group_id in guest client registration allows unauthorized promo code use
Affected: < 0.8.0
CVE-2026-33734
6.9
0%
Jul 6
FOSSBilling has improper SQL neutralization in `Massmailer` recipient filters
Affected: >= 0.6.0, < 0.8.0
CVE-2026-43920
6.9
1%
Jun 25
FOSSBilling: Unauthenticated update patcher endpoint allows remote maintenance execution
Affected: >= 0.5.4, < 0.8.0
CVE-2026-40495
6.9
0%
Jun 3
FOSSBilling version exposed via asset cache buster
Affected: < 0.8.0
CVE-2023-3229
6.5
1%
Jun 14
Business Logic Errors in fossbilling/fossbilling
Affected: before 0.5.0
CVE-2026-43926
6.3
0%
Jun 4
FOSSBilling's password reset confirmation endpoint lacks rate limiting
Affected: < 0.8.0
CVE-2023-3521
6.1
1%
Jul 6
Cross-site Scripting (XSS) - Reflected in fossbilling/fossbilling
Affected: before 0.5.4
CVE-2023-3228
5.7
0%
Jun 14
Business Logic Errors in fossbilling/fossbilling
Affected: before 0.5.0
CVE-2023-3227
5.7
0%
Jun 14
Insufficient Granularity of Access Control in fossbilling/fossbilling
Affected: before 0.5.0
CVE-2023-3394
5.4
1%
Jun 23
Session Fixation in fossbilling/fossbilling
Affected: before 0.5.1
CVE-2026-53642
5.3
0%
Jul 6
FOSSBilling: Unverified clients can access client-area pages when email confirmation is required
Affected: >= 0.5.6, < 0.8.0
CVE-2026-53648
5.1
0%
Jul 6
FOSSBilling: Downloadable product files can be overwritten through filename collisions
Affected: < 0.8.1
CVE-2025-64105
5.1
0%
Jun 23
FOSSBilling: IDOR Vulnerability in Support Ticket Creation
Affected: >= 0.6.21, < 0.8.0
CVE-2026-53641
4.8
0%
Jul 6
FOSSBilling has stored XSS in client email views via unescaped content in JavaScript template literal
Affected: >= 0.6.0, < 0.8.0
CVE-2026-43924
4.8
0%
Jun 3
FOSSBilling has an open redirect via administrator-configured redirect targets
Affected: < 0.8.0
CVE-2023-3568
4.8
0%
Jul 10
Open Redirect in alextselegidis/easyappointments
Affected: before 0.5.4
CVE-2026-111046
2.3
0%
Oct 19
FOSSBilling: Low-privileged staff can read and modify configuration of deactivated extensions
Affected: >= 0.8.4, < 0.8.6
CVE-2026-53640
2.3
0%
Jul 6
FOSSBilling missing authorization checks on read-only admin API endpoints expose sensitive staff, client, and redirect data
Affected: < 0.8.0
CVE-2026-43928
2.3
0%
Jul 6
FOSSBilling: Payment amount not validated in PayPalEmail adapter allows invoice underpayment
Affected: < 0.8.0
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