The SiteGround Security plugin for WordPress is vulnerable to authentication bypass that allows unauthenticated users to log in as administrative users due to missing identity verification on the 2FA back-up code implementation that logs users in upon success. This affects versions up to, and including, 1.2.5.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-0993
• https://plugins.trac.wordpress.org/changeset/2706302
• https://www.wordfence.com/blog/2022/04/critical-authentication-bypass-vulnerability-patched-in-siteground-security-plugin/https://www.wordfence.com/blog/2022/04/critical-authentication-bypass-vulnerability-patched-in-siteground-security-plugin/
• https://www.wordfence.com/blog/2022/04/critical-authentication-bypass-vulnerability-patched-in-siteground-security-plugin/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/8e3a5566-eee5-4f71-9c93-e59abf913d04?source=cve