Vulnerability · Published Aug 13, 2026 · Assigned by Patchstack
CVE-2026-27543WordPress MStore API plugin <= 4.20.0 - Privilege Escalation vulnerability
High 8.1
In plain English
A high-severity security flaw in MStore API from FluxBuilder. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.4%top 68.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| FluxBuilder | MStore API | n/a – through 4.20.0 |
Weakness: CWE-266 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H