CVE-2021-20787

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{"affected": [{"affectedData": [{"product": "GroupSession", "vendor": "Japan Total System Co.,Ltd.", "versions": [{"status": "affected", "version": "GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0"}]}], "source": "vultures@jpcert.or.jp"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*", "matchCriteriaId": "BCD711A0-12D3-4FC1-B1F3-084DD5D9721B", "versionEndExcluding": "5.1.0", "versionStartIncluding": "2.20", "vulnerable": true}, {"criteria": "cpe:2.3:a:groupsession:groupsession_bycloud:*:*:*:*:*:*:*:*", "matchCriteriaId": "20139ED3-424E-49EB-9D6D-9EAA356C0D96", "versionEndExcluding": "5.1.0", "versionStartIncluding": "3.0.3", "vulnerable": true}, {"criteria": "cpe:2.3:a:groupsession:groupsession_zion:*:*:*:*:*:*:*:*", "matchCriteriaId": "9F38C4EF-470B-4C54-B57F-7C99AB59BF73", "versionEndExcluding": "5.1.0", "versionStartIncluding": "3.0.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Cross-site scripting vulnerability in GroupSession (GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0) allows a remote attacker to inject an arbitrary script by sending a specially crafted request to a specific URL."}, {"lang": "es", "value": "Una vulnerabilidad de tipo Cross-site scripting en GroupSession (GroupSession Free edition desde versi\u00f3n 2.2.0 hasta versi\u00f3n anterior a 5.1.0, GroupSession byCloud desde versi\u00f3n 3.0.3 hasta versi\u00f3n anterior a 5.1.0, y GroupSession ZION desde versi\u00f3n 3.0.3 hasta versi\u00f3n anterior a 5.1.0) permite a un atacante remoto inyectar un script arbitrario mediante el env\u00edo de una petici\u00f3n especialmente dise\u00f1ada hacia una URL espec\u00edfica"}], "id": "CVE-2021-20787", "lastModified": "2026-06-17T03:34:27.173", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "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": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-30T14:15:14.840", "references": [{"source": "vultures@jpcert.or.jp", "tags": ["Vendor Advisory"], "url": "https://groupsession.jp/info/info-news/security202107"}, {"source": "vultures@jpcert.or.jp", "tags": ["Third Party Advisory"], "url": "https://jvn.jp/en/jp/JVN86026700/index.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://groupsession.jp/info/info-news/security202107"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://jvn.jp/en/jp/JVN86026700/index.html"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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