{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-4451 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-4451 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-4451 is a medium-severity unsafe deserialization vulnerability in nintechnet NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall, published on 16 Oct 2024. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-4451 and fix it if it is affected.\n\nWhat it is: CVE-2021-4451 is a medium-severity unsafe deserialization vulnerability in nintechnet NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall, published on 16 Oct 2024. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-4451 in the wild and no public exploit code.\n\nAffected product: nintechnet NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-4451/ (Markdown: https://insights.sbomify.com/CVE-2021-4451/index.md)","id":"CVE-2021-4451","markdown":"https://insights.sbomify.com/CVE-2021-4451/index.md","name":"CVE-2021-4451","record":{"aliases":["GHSA-pgv2-9j82-2qcq"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"WordPress security plugin","requires_auth":"high_privilege","summary":"Authenticated attackers can exploit PHAR deserialization in NinjaFirewall to potentially execute code if vulnerable software is present.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[{"product":"ninjafirewall","vendor":"nintechnet"}],"cvss":{"score":6.6,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"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).","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"NinjaFirewall \u003c= 4.3.3 - Authenticated PHAR Deserialization","id":"CVE-2021-4451","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Google Language Translator \u003c= 6.0.9 - Reflected Cross-Site Scripting","id":"CVE-2021-4452"},"packages":[],"prev":{"headline":"Post Grid \u003c= 2.1.12 - Contributor+ SQL Injection","id":"CVE-2021-4450"},"products":["NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall"],"published":"2024-10-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-08","vendors":["nintechnet"]},"summary":"Authenticated attackers can exploit PHAR deserialization in NinjaFirewall to potentially execute code if vulnerable software is present.","url":"https://insights.sbomify.com/CVE-2021-4451/"}