There is functionality in the Store Locator Plus for WordPress plugin through 5.5.14 that made it possible for authenticated users to update their user meta data to become an administrator on any site using the plugin.
https://www.wordfence.com/blog/2021/04/severe-unpatched-vulnerabilities-leads-to-closure-of-store-locator-plus-plugin/
https://wpscan.com/vulnerability/078e93cd-7cf2-4e23-8171-58d44e354d62
Source: Mitre, NVD
Published: 2021-05-17
Updated: 2026-06-17
Base Score: 6.5
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P
Severity: Medium
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00569