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mettle Sendportal CVE-2026-15191

| EUVDEUVD-2026-42619 LOW
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-07-09 VulDB GHSA-274r-rpm4-6m3r
Authentication Bypass PHP Sendportal
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
vuln.today AI
5.4 MEDIUM

Network-reachable endpoint requires authenticated user (PR:L); IDOR yields low confidentiality and integrity impact on campaign data with no availability impact evident.

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

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Jul 09, 2026 - 17:24 vuln.today
Severity Changed
Jul 09, 2026 - 17:22 NVD
MEDIUM LOW
CVSS changed
Jul 09, 2026 - 17:22 NVD
5.3 (MEDIUM) 2.1 (LOW)

DescriptionCVE.org

A flaw has been found in mettle sendportal up to 3.0.1. This vulnerability affects unknown code of the file vendor/mettle/sendportal-core/src/Http/Requests/CampaignStoreRequest.php of the component Campaign Creation Endpoint. Executing a manipulation can lead to authorization bypass. The attack can be executed remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

AnalysisAI

Authorization bypass in mettle Sendportal up to version 3.0.1 permits authenticated remote users to circumvent object-level access controls at the Campaign Creation Endpoint, potentially allowing cross-tenant campaign manipulation. The root cause is CWE-639 (Authorization Bypass Through User-Controlled Key), a class of IDOR flaw where the server trusts a user-supplied identifier to gate resource access without re-verifying ownership. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain valid Sendportal user credentials
Delivery
Authenticate to target instance
Exploit
Craft campaign creation request with manipulated workspace/resource key
Execution
Submit to CampaignStoreRequest.php endpoint
Persist
Authorization check bypassed via IDOR
Impact
Access or write campaign data belonging to another tenant
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Vulnerability AssessmentAI

Exploitation The attacker must possess a valid, authenticated user account on the target Sendportal instance - this is confirmed by the CVSS 4.0 PR:L metric. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 2.1 reflects constrained real-world impact: the PR:L metric confirms exploitation requires an authenticated session, substantially reducing the exposed attack surface to registered users only. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A registered user on a shared Sendportal instance crafts a POST request to the campaign creation endpoint, substituting a victim workspace or user identifier for their own in the request body or route parameter. Because `CampaignStoreRequest.php` does not re-verify ownership of the referenced key, the authorization check passes and the attacker creates or manipulates campaign data belonging to another tenant. …
Remediation No vendor-released patch identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-15191 vulnerability details – vuln.today
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