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NextCRM EUVDEUVD-2026-46110

| CVE-2026-55550 HIGH
Improper Privilege Management (CWE-269)
2026-07-20 GitHub_M
7.1
CVSS 3.1 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
7.1 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
vuln.today AI
7.1 HIGH

Network-reachable MCP endpoint (AV:N/AC:L), requires an authenticated low-privileged user with a token (PR:L, no UI); high integrity from unauthorized catalog writes, low availability from soft-delete/archive, no data disclosure (C:N).

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Jul 20, 2026 - 21:45 vuln.today
CVE Published
Jul 20, 2026 - 21:02 cve.org
HIGH 7.1

DescriptionCVE.org

NextCRM is open-source customer relationship management (CRM) software. The CRM product catalog is an organization-wide business object. Normal application server actions restrict product creation, update, and deletion to manager and admin roles. However, in version 0.12.1, the MCP product tools expose the same write operations through /api/mcp/mcp using user-generated Bearer tokens and do not enforce role checks. Any authenticated low-privileged user who can generate an MCP API token can create, modify, archive, or soft-delete products in the shared CRM product catalog. Version 0.12.3 contains a fix.

AnalysisAI

Improper privilege enforcement in NextCRM 0.12.1 lets any authenticated low-privileged user create, modify, archive, or soft-delete entries in the organization-wide product catalog by calling MCP product tools at /api/mcp/mcp with a self-generated Bearer token. While the standard application server restricts these write operations to manager and admin roles, the MCP interface omits the role checks entirely, giving a vertical privilege escalation over shared business data. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate as low-privileged user
Delivery
Generate MCP API Bearer token
Exploit
POST product write call to /api/mcp/mcp
Execution
Role check bypassed on MCP path
Persist
Create/modify/archive/soft-delete catalog products
Impact
Shared CRM data integrity compromised

Vulnerability AssessmentAI

Exploitation Exploitation requires (1) a NextCRM 0.12.1 deployment with the MCP interface at /api/mcp/mcp enabled, and (2) an authenticated low-privileged account able to generate an MCP API Bearer token - the CVSS PR:L reflects this authenticated prerequisite. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L, score 7.1) is internally consistent with the description: network-reachable, low complexity, requires low privileges (an authenticated user who can mint an MCP token), no user interaction, high integrity impact (unauthorized writes to shared data) and low availability impact (soft-delete/archive can remove products from view). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A low-privileged sales user of a shared NextCRM instance generates an MCP API token from their own account, then sends crafted requests to /api/mcp/mcp invoking the product write tools. Because no role check is enforced on that path, they archive or soft-delete competitors' products, alter pricing/details, or inject bogus catalog entries that every other tenant user sees. …
Remediation Upgrade to NextCRM 0.12.3, which contains the fix (Vendor-released patch: 0.12.3); consult the advisory at https://github.com/pdovhomilja/nextcrm-app/security/advisories/GHSA-wv63-cq38-qg58 for details. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all NextCRM 0.12.1 instances and audit product catalog modification logs for unauthorized changes by low-privileged users. …

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EUVD-2026-46110 vulnerability details – vuln.today

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