CVE-2026-77759— IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records
Quick assessment
Affected
Roskus Prospero Flow CRM
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.
Roskus Prospero Flow CRM 5.0.0 至 5.3.5 版本中，交易 API 存在通过用户可控键值绕过授权的安全漏洞。该漏洞允许经过身份验证的用户通过在对 GET /api/transaction/{id} 请求中使用递增的标识符，读取同一实例下其他公司的交易数据。由于该接口在解析标识符时未施加公司范围限制，且未进行任何权限检查，从而导致未经授权的数据访问。
Possible ATT&CK Techniques 1 AI
T1528 · Steal Application Access TokenAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Roskus | Prospero Flow CRM | 5.0.0< 5.3.6 |
affected |
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I. Basic Information for CVE-2026-77759
Vulnerability Information
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Vulnerability Title
IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records
Source: CVE Program / CVE List V5
Vulnerability Description
Authorization Bypass Through User-Controlled Key in the transaction API in Roskus Prospero
Flow CRM 5.0.0 through 5.3.5 allows an authenticated user to read the transactions of other
companies on the same instance via an incremented identifier in GET /api/transaction/{id},
which is resolved without company scoping and without any permission check.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Roskus | Prospero Flow CRM | 5.0.0 ~ 5.3.6 | - |
|
II. Public POCs for CVE-2026-77759
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-77759 (2)
Vendor Advisories for CVE-2026-77759 (1)
IV. Related Vulnerabilities
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-
CVE-2026-78337
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Use of hard-coded credentials in Prospero Flow CRM employee -
CVE-2026-19870
IDOR in Prospero Flow CRM allows cross-tenant payroll disclo -
CVE-2026-19734
IDOR in Prospero Flow CRM allows cross-tenant product disclo
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-
CVE-2026-78337
Unrestricted upload of file with dangerous type in Prospero -
CVE-2026-77780
Unvalidated bank account and card foreign keys in the Prospe -
CVE-2026-19871
Use of hard-coded credentials in Prospero Flow CRM employee -
CVE-2026-19870
IDOR in Prospero Flow CRM allows cross-tenant payroll disclo -
CVE-2026-19734
IDOR in Prospero Flow CRM allows cross-tenant product disclo
Same weakness: CWE-639
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V. Comments for CVE-2026-77759
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