CVE-2026-16038MStore API < 4.21.0 - Unauthenticated Payment Bypass via Multiple Payment Gateways
Updated under an hour ago ()
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It affects Unknown MStore API. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The MStore API WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.
- CVSS
- 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- WPScan
- NVD analysis
- Deferred
- Record last updated
- Aug 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Unknown MStore API unknown:mstore_api (from the name) | before 4.21.0 | CNA record |
References
- https://wpscan.com/vulnerability/6321d247-39c7-43a6-a528-202e1118a5d5/exploit, vdb-entry, technical-description
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.