FO
Product
FOSSBilling
by FOSSBilling · last CVE Oct 30, 2026
43
CVEs
0
On KEV
10.0
Max CVSS
4
New 30D
Severity mix
Critical 6High 13Medium 21Low 3
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CVECVSSEPSSPublishedSummary · affected versions
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
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