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9.9
CVE-2026-111490: MatchPoint API lets users view and change others' data
CVE-2026-111490 · published 4 days ago
Summary
The MatchPoint API trusts a header named “actingasuser” without checking if the caller is allowed to act as that user. Because of this, someone could alter the header to see personal and financial information, read private messages, steal QR codes, change passwords, impersonate users, and move virtual balances. Update the software to a version that validates the header or add proper authorization checks and review access logs for any unusual activity.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| tpc software | matchpoint | Versions prior to latest one |
Original advisory text
Insecure direct object reference (IDOR) vulnerability in the MatchPoint API
Insecure direct object reference (IDOR) vulnerability in the MatchPoint API, which relies on the `actingasuser` HTTP header without verifying the requester's authorization for the specified user. Manipulation of sequential identifiers allows access to personal, banking, and financial data, private messages, and QR codes for physical access, as well as the ability to modify third-party accounts, change passwords, impersonate users, and transfer virtual balances.
Severity
9.9
Critical
Type
CWE-639Authorization Bypass Through User-Controlled Key
Timeline
Published5 Nov 2026
Updated6 Nov 2026
First seen5 Nov 2026
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