{"id":"CVE-2021-4451","state":"PUBLISHED","title":"NinjaFirewall <= 4.3.3 - Authenticated PHAR Deserialization","description":"The NinjaFirewall plugin for WordPress is vulnerable to Authenticated PHAR Deserialization in versions up to, and including, 4.3.3. This allows authenticated attackers to perform phar deserialization on the server.  This deserialization can allow other plugin or theme exploits if vulnerable software is present (WordPress, and NinjaFirewall).","publishedAt":"2024-10-16T06:43:24.799Z","updatedAt":"2026-04-08T16:38:00.833Z","severity":{"score":6.6,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","source":"Wordfence"},"assigner":"Wordfence","products":["nintechnet NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall"],"affected":[{"vendor":"nintechnet","product":"NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.3.4","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/1a1fc6c9-50cd-40fd-a777-9eed98aab797?source=cve","https://blog.nintechnet.com/security-issue-fixed-in-ninjafirewall-wp-edition/"],"weaknesses":["CWE-502"],"ingestedAt":"2026-10-29T19:49:23.890Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/4xxx/CVE-2021-4451.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-4451","state":"PUBLISHED","datePublished":"2024-10-16T06:43:24.799Z","dateUpdated":"2026-04-08T16:38:00.833Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2024-10-15T18:41:39.775Z"},"containers":{"cna":{"title":"NinjaFirewall <= 4.3.3 - Authenticated PHAR Deserialization","descriptions":[{"lang":"en","value":"The NinjaFirewall plugin for WordPress is vulnerable to Authenticated PHAR Deserialization in versions up to, and including, 4.3.3. This allows authenticated attackers to perform phar deserialization on the server.  This deserialization can allow other plugin or theme exploits if vulnerable software is present (WordPress, and NinjaFirewall)."}],"affected":[{"vendor":"nintechnet","product":"NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.3.4","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/1a1fc6c9-50cd-40fd-a777-9eed98aab797?source=cve"},{"url":"https://blog.nintechnet.com/security-issue-fixed-in-ninjafirewall-wp-edition/"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","baseScore":6.6,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","lang":"en","description":"CWE-502 Deserialization of Untrusted Data","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-04-08T16:38:00.833Z"},"credits":[{"lang":"en","type":"finder","value":"Chloe Chamberland"}],"timeline":[{"time":"2021-05-30T00:00:00.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"ninjatechnologiesnetwork","product":"ninja_firewall","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"4.3.4","versionType":"custom"}],"cpes":["cpe:2.3:a:ninjatechnologiesnetwork:ninja_firewall:*:*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-10-16T18:59:15.346812Z","id":"CVE-2021-4451","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-10-16T19:07:11.134Z"}}]}}}