{"affected":[{"affectedData":[{"product":"pfSense CE and pfSense Plus","vendor":"pfSense","versions":[{"status":"affected","version":"pfSense CE software versions 2.5.2 and earlier, and pfSense Plus software versions 21.05 and earlier"}]}],"source":"vultures@jpcert.or.jp"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:netgate:pfsense_plus:*:*:*:*:*:*:*:*","matchCriteriaId":"C9BDFCA2-6396-4C3B-A9AC-5EC338647EF9","versionEndIncluding":"21.05","vulnerable":true},{"criteria":"cpe:2.3:a:pfsense:pfsense:*:*:*:*:community:*:*:*","matchCriteriaId":"AB55BCF1-D53C-42A7-A288-171E9BD20FDA","versionEndIncluding":"2.5.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"Cross-site scripting vulnerability in pfSense CE and pfSense Plus (pfSense CE software versions 2.5.2 and earlier, and pfSense Plus software versions 21.05 and earlier) allows a remote attacker to inject an arbitrary script via a malicious URL."},{"lang":"es","value":"Una vulnerabilidad de tipo cross-site scripting en pfSense CE y pfSense Plus (software pfSense CE versiones 2.5.2 y anteriores, y software pfSense Plus versiones 21.05 y anteriores) permite a un atacante remoto inyectar un script arbitrario por medio de una URL maliciosa"}],"id":"CVE-2021-20729","lastModified":"2026-06-17T03:34:19.953","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"MEDIUM","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"NONE","baseScore":4.3,"confidentialityImpact":"NONE","integrityImpact":"PARTIAL","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","version":"2.0"},"exploitabilityScore":8.6,"impactScore":2.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":true}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"exploitabilityScore":2.8,"impactScore":2.7,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2022-03-31T08:15:08.130","references":[{"source":"vultures@jpcert.or.jp","tags":["Third Party Advisory"],"url":"https://docs.netgate.com/downloads/pfSense-SA-21_02.captiveportal.asc"},{"source":"vultures@jpcert.or.jp","tags":["Third Party Advisory","VDB Entry"],"url":"https://jvn.jp/en/jp/JVN87751554/index.html"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://docs.netgate.com/downloads/pfSense-SA-21_02.captiveportal.asc"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"url":"https://jvn.jp/en/jp/JVN87751554/index.html"}],"sourceIdentifier":"vultures@jpcert.or.jp","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-79"}],"source":"nvd@nist.gov","type":"Primary"}]}