CVE-2026-111358
SendPortal sendportal-core through 4.0.1 Cross-Workspace Tag Attachment via Subscriber Form
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | mettle |
| Product | sendportal-core |
| Published | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
mettle / sendportal-core
0 ≤ 4.0.1
References
hackmd.io: https://hackmd.io/@hieuPenguinnn/sendportal-subscriber-tags-cross-workspace-attach github.com: https://github.com/mettle/sendportal-core/blob/v4.0.1/src/Repositories/Subscribers/BaseSubscriberTenantRepository.php#L48-L51 github.com: https://github.com/mettle/sendportal-core/blob/v4.0.1/src/Http/Requests/SubscriberRequest.php#L34-L37 github.com: https://github.com/mettle/sendportal-core vulncheck.com: https://www.vulncheck.com/advisories/sendportal-sendportal-core-through-4.0.1-cross-workspace-tag-attachment-via-subscriber-form
Credits
hieuPenguinnn