The nd-shortcodes plugin before 6.0 for WordPress has a nopriv_ AJAX action that allows modification of the siteurl setting.
https://wpvulndb.com/vulnerabilities/9485
https://wordpress.org/plugins/nd-shortcodes/#developers
Source: Mitre, NVD
Published: 2019-08-29
Updated: 2019-09-04
Base Score: 5.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N