An issue was discovered in the "Ultimate Addons for Elementor" plugin before 1.24.2 for WordPress, as exploited in the wild in May 2020 in conjunction with CVE-2020-13126. Unauthenticated attackers can create users with the Subscriber role even if registration is disabled.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-13125
• https://wpvulndb.com/vulnerabilities/10214
• https://www.wordfence.com/blog/2020/05/combined-attack-on-elementor-pro-and-ultimate-addons-for-elementor-puts-1-million-sites-at-risk/