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CVE-2026-23513— FOSSBilling: Broken Authorization in Client Transaction and Order Listings

Quick assessment

Affected
FOSSBilling FOSSBilling
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

fossbilling是fossbilling团队开源的一种高效计费和客户管理方案。 FOSSBilling 0.7.2及之前版本存在授权问题漏洞，该漏洞源于在ServiceTransaction::getSearchQuery()和Order\Service::getSearchQuery()中基于OR的搜索/动作过滤器没有分组添加，导致SQL运算符优先级独立于强制执行的client_id约束评估OR子句，可能导致已认证客户端绕过租户范围并检索其他客户端数据。

AI Predicted 8.8 Difficulty: Easy EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
FOSSBilling FOSSBilling < 0.8.0 affected
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I. Basic Information for CVE-2026-23513

Vulnerability Information
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Vulnerability Title
FOSSBilling: Broken Authorization in Client Transaction and Order Listings
Source: CVE Program / CVE List V5
Vulnerability Description
FOSSBilling is a free, open-source billing and client management system. In versions 0.7.2 and prior, a query-construction flaw in client list endpoints allowed authenticated clients to bypass tenant scoping and retrieve other clients’ data. Details In ServiceTransaction::getSearchQuery() and Order\Service::getSearchQuery(), OR-based search/action filters were appended without grouping, allowing SQL operator precedence to evaluate OR clauses independently of the enforced client_id constraint. Crafted requests could therefore return records and metadata belonging to other clients, including identifiers, amounts, status, timestamps, and related fields. This issue was fixed in version 0.8.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
FOSSBilling 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fossbilling是fossbilling团队开源的一种高效计费和客户管理方案。 FOSSBilling 0.7.2及之前版本存在授权问题漏洞，该漏洞源于在ServiceTransaction::getSearchQuery()和Order\Service::getSearchQuery()中基于OR的搜索/动作过滤器没有分组添加，导致SQL运算符优先级独立于强制执行的client_id约束评估OR子句，可能导致已认证客户端绕过租户范围并检索其他客户端数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FOSSBilling FOSSBilling < 0.8.0 -

II. Public POCs for CVE-2026-23513

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III. Intelligence Information for CVE-2026-23513

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Vendor Advisories for CVE-2026-23513 (1)

Vendor Pages for CVE-2026-23513 (1)

Same Patch Batch · FOSSBilling · 2026-06-23 · 4 CVEs total

CVE-2026-27604 FOSSBilling: Improper API Role Validation (system) Enables Unauthenticated Access to Privi
CVE-2026-28496 FOSSBilling: Server-side template injection in Twig template rendering enables information
CVE-2025-64105 FOSSBilling: IDOR Vulnerability in Support Ticket Creation

IV. Related Vulnerabilities

Same product: FOSSBilling
Same vendor: FOSSBilling
Same weakness: CWE-863

V. Comments for CVE-2026-23513

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