Missing Authorization in Prospero Flow CRM permission save endpoint allows privilege escalation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-59233
StatePUBLISHED
AssignerSecur0
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:19:51 UTC
Updated2026-08-10 18:18:47 UTC
DescriptionMissing Authorization in the permission management component in Roskus Prospero Flow CRM before 5.2.1 allows any authenticated user to grant any role, including their own, the complete set of application permissions via a crafted POST request to the permission save endpoint, which performs no authorization check before synchronizing the submitted permissions to the specified role.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from 4daa8cea-433a-44bd-9456-53b127fc289a

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002380000 probability, percentile 0.149150000 (date 2026-08-11)

Problem Types: CWE-639 | CWE-639 CWE-639 Authorization bypass through User-Controlled key

VersionSourceTypeScoreSeverityVector
4.04daa8cea-433a-44bd-9456-53b127fc289aSecondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Roskus Prospero Flow CRM affected 5.2.1 semver Not specified

References

ReferenceSourceLinkTags
github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3 4daa8cea-433a-44bd-9456-53b127fc289a github.com
github.com/Roskus/prospero-flow-crm/commit/86a7d6557bd111518a221f4575ad6... 4daa8cea-433a-44bd-9456-53b127fc289a github.com
secur0.com/en/cna/cve-list/cve-2026-59233-missing-authorization-in-prosp... 4daa8cea-433a-44bd-9456-53b127fc289a secur0.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: k1di3 (en)

CNA: Cristian Fernández Cornejo (en)

CNA: Xoán M. Otero Jorge (en)

CNA: Secur0 CNA (en)

CNA: Gustavo Novaro (en)

Additional Advisory Data

Solutions

CNA: Upgrade to version 5.2.1 or higher.

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