WordPress before 5.2.4 is vulnerable to poisoning of the cache of JSON GET requests because certain requests lack a Vary: Origin header.Referenceshttps://wpvulndb.com/vulnerabilities/9911https://blog.wpscan.org/wordpress/security/release/2019/10/15/wordpress-524-security-release-breakdown.htmlhttps://wordpress.org/news/2019/10/wordpress-5-2-4-security-release/https://core.trac.wordpress.org/changeset/46478https://github.com/WordPress/WordPress/commit/b224c251adfa16a5f84074a3c0886270c9df38dehttps://seclists.org/bugtraq/2020/Jan/8https://www.debian.org/security/2020/dsa-4599https://www.debian.org/security/2020/dsa-4677
