{"id":"CVE-2021-4416","aliases":["EUVD-2021-34243","GHSA-pmjg-6h25-mhp4"],"status":"published","title":"wp-mpdf \u003c= 3.5.1 - Cross-Site Request Forgery Bypass","description":"The wp-mpdf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.5.1. This is due to missing or incorrect nonce validation on the mpdf_admin_savepost() function. This makes it possible for unauthenticated attackers to save post data via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00384,"percentile":0.32845,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-352"],"published":"2023-07-12T03:40:45Z","modified":"2026-06-17T04:19:42Z","products":[{"vendor":"fkrauthan","product":"wp-mpdf"},{"vendor":"wp-mpdf_project","product":"wp-mpdf"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c47386ee-25c8-4a77-92e8-5a82afc9c826?source=cve","tags":["x_transferred","Third Party Advisory"]},{"url":"https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://plugins.trac.wordpress.org/changeset/2549363/wp-mpdf/trunk/wp-mpdf.php","tags":["x_transferred","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4416"},{"url":"https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks"},{"url":"https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks"},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1"},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2"},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3"},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4"},{"url":"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5"},{"url":"https://github.com/advisories/GHSA-pmjg-6h25-mhp4"}],"sources":{"cve":[{"id":"CVE-2021-4416","title":"wp-mpdf \u003c= 3.5.1 - Cross-Site Request Forgery Bypass","description":"The wp-mpdf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.5.1. This is due to missing or incorrect nonce validation on the mpdf_admin_savepost() function. This makes it possible for unauthenticated attackers to save post data via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.","status":"published","published":"2023-07-12T03:40:45.37Z","modified":"2026-04-08T17:20:40.729Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-34243","description":"The wp-mpdf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.5.1. This is due to missing or incorrect nonce validation on the mpdf_admin_savepost() function. This makes it possible for unauthenticated attackers to save post data via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.","status":"published","published":"2023-07-12T03:40:45Z","modified":"2026-04-08T17:20:40Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:24:41.449169Z"}],"ghsa":[{"id":"GHSA-pmjg-6h25-mhp4","title":"The wp-mpdf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to,...","description":"The wp-mpdf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.5.1. This is due to missing or incorrect nonce validation on the mpdf_admin_savepost() function. This makes it possible for unauthenticated attackers to save post data via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.","status":"published","published":"2023-07-12T06:30:32Z","modified":"2024-04-04T06:01:11Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:56:38.230075Z"}],"nvd":[{"id":"CVE-2021-4416","description":"The wp-mpdf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.5.1. This is due to missing or incorrect nonce validation on the mpdf_admin_savepost() function. This makes it possible for unauthenticated attackers to save post data via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.","status":"published","published":"2023-07-12T04:15:11.337Z","modified":"2026-06-17T04:19:42.78Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:07:07.764332Z"}]}}