SendPortal sendportal-core through 4.0.1 contains an authorization bypass vulnerability that allows authenticated workspace members to attach subscribers to other workspaces' tags by supplying unvalidated tag IDs. Attackers can submit sequential tag IDs via the web subscriber form or CSV import to receive victim campaign content and skew victim reports.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
mettle sendportal-core unaffected
Version Status Constraints
0 affected ≤ 4.0.1

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/mettle/sendportal-core cve-icon cve-icon
https://github.com/mettle/sendportal-core/blob/v4.0.1/src/Http/Requests/SubscriberRequest.php#L34-L37 cve-icon cve-icon
https://github.com/mettle/sendportal-core/blob/v4.0.1/src/Repositories/Subscribers/BaseSubscriberTenantRepository.php#L48-L51 cve-icon cve-icon
https://hackmd.io/@hieuPenguinnn/sendportal-subscriber-tags-cross-workspace-attach cve-icon cve-icon
https://www.vulncheck.com/advisories/sendportal-sendportal-core-through-4.0.1-cross-workspace-tag-attachment-via-subscriber-form cve-icon cve-icon
History

Thu, 15 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
Description SendPortal sendportal-core through 4.0.1 contains an authorization bypass vulnerability that allows authenticated workspace members to attach subscribers to other workspaces' tags by supplying unvalidated tag IDs. Attackers can submit sequential tag IDs via the web subscriber form or CSV import to receive victim campaign content and skew victim reports.
Title SendPortal sendportal-core through 4.0.1 Cross-Workspace Tag Attachment via Subscriber Form
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-15T21:43:46.335Z

Reserved: 2026-10-15T20:57:01.492Z

Link: CVE-2026-111358

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-15T22:19:33.793

Modified: 2026-10-15T22:19:33.793

Link: CVE-2026-111358

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses