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Prospero Flow Crm EUVDEUVD-2026-49632

| CVE-2026-59240 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-07-27 Secur0 GHSA-m6x4-f6j4-9qq6
6.9
CVSS 4.0 · Vendor: Secur0
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Object-level authorization, IDOR prevention
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Unauthorized notification deletion in Prospero Flow CRM allows any authenticated user to delete other users' notifications by manipulating the ID parameter in the /notification/delete/{id} endpoint. Sequential notification IDs enable systematic deletion across the system, disrupting user awareness of critical business events. A vendor fix is available in version 5.5.3, and no active exploitation has been reported.

Affected VersionsENISA

Prospero Flow CRM 1.0.0 <5.5.1

Affected Packages

euvd prospero_flow_crm fix: 5.5.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Secur0) PRIMARY 6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Secur0) · only source for this CVE.

CVSS VectorVendor: Secur0

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

The vulnerability involves an Insecure Direct Object Reference (IDOR) in the DeleteNotificationController::delete() method at endpoint GET /notification/delete/{id}. The flaw allows any authenticated user, regardless of company or permissions, to delete notifications belonging to any other user in the system. The controller retrieves the target record with Notification::findOrFail($id) and deletes it without validating user_id or company_id ownership, unlike the sibling SetNotificationReadAjaxController, which correctly scopes lookups by Auth::id(). Because notification identifiers are sequential, an attacker can iterate over IDs to systematically delete notifications belonging to any user, denying them visibility of ticket alerts, task assignments, and other system events.

Threat Intelligence Overview

EPSS Score
0.3%
Top 79% exploitable
Social Media
1
Sightings
Data Quality
7 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment CIRCL GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

CVE-2026-78365 CRITICAL
9.3 Aug 24

Cross-tenant authorization bypass (IDOR/BOLA) in Roskus Prospero Flow CRM 4.0.0 through 5.3.1 lets an authenticated user

CVE-2026-59235 HIGH
8.7 Jul 15

Broken function-level authorization in Prospero Flow CRM before 5.5.3 lets any authenticated low-privileged user (e.g. t

CVE-2026-77759 HIGH
8.7 Aug 21

Cross-tenant transaction data exposure in Roskus Prospero Flow CRM 5.0.0-5.3.5 allows any authenticated user on a shared

CVE-2026-59233 HIGH
8.7 Aug 10

Privilege escalation in Roskus Prospero Flow CRM before version 5.2.1 permits any authenticated user - regardless of ass

CVE-2026-19734 HIGH
8.6 Aug 13

Cross-tenant IDOR in Roskus Prospero Flow CRM before 5.4.7 allows any authenticated user to read sensitive product recor

CVE-2026-19539 HIGH
8.6 Aug 11

Cross-tenant IDOR in Roskus Prospero Flow CRM's ticket management component allows any authenticated user - regardless o

CVE-2026-19870 HIGH
8.6 Aug 14

Cross-tenant payroll data exposure in Roskus Prospero Flow CRM before 5.15.10 enables authenticated users holding standa

CVE-2026-19433 HIGH
8.6 Aug 10

Cross-tenant IDOR in Prospero Flow CRM before 5.4.8 allows any authenticated user to blindly overwrite contact records b

CVE-2026-59236 MEDIUM
6.9 Jul 15

Cross-tenant record injection in Roskus Prospero Flow CRM before 5.14.0 allows any authenticated user to silently insert

CVE-2026-59237 MEDIUM
6.9 Jul 16

Cross-tenant IDOR in Roskus Prospero Flow CRM before 5.5.3 allows any authenticated user to read, modify, and delete ord

CVE-2026-77780 MEDIUM
5.3 Aug 21

Tenant data boundary failure in Roskus Prospero Flow CRM 4.9.1-5.14.0 allows authenticated users holding transaction and

CVE-2026-82911 MEDIUM
5.1 Sep 04

Order confirmation in Roskus Prospero Flow CRM before 5.15.11 can be triggered by an unauthenticated attacker on behalf

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