CVE-2021-43791

{"containers": {"cna": {"affected": [{"product": "zulip", "vendor": "zulip", "versions": [{"status": "affected", "version": "< 4.8"}]}], "descriptions": [{"lang": "en", "value": "Zulip is an open source group chat application that combines real-time chat with threaded conversations. In affected versions expiration dates on the confirmation objects associated with email invitations were not enforced properly in the new account registration flow. A confirmation link takes a user to the check_prereg_key_and_redirect endpoint, before getting redirected to POST to /accounts/register/. The problem was that validation was happening in the check_prereg_key_and_redirect part and not in /accounts/register/ - meaning that one could submit an expired confirmation key and be able to register. The issue is fixed in Zulip 4.8. There are no known workarounds and users are advised to upgrade as soon as possible."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-613", "description": "CWE-613: Insufficient Session Expiration", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-12-02T00:15:11.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6"}], "source": {"advisory": "GHSA-wj76-pcqr-mf9f", "discovery": "UNKNOWN"}, "title": "Ineffective expiration validation for invitation links in Zulip", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-43791", "STATE": "PUBLIC", "TITLE": "Ineffective expiration validation for invitation links in Zulip"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "zulip", "version": {"version_data": [{"version_value": "< 4.8"}]}}]}, "vendor_name": "zulip"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Zulip is an open source group chat application that combines real-time chat with threaded conversations. In affected versions expiration dates on the confirmation objects associated with email invitations were not enforced properly in the new account registration flow. A confirmation link takes a user to the check_prereg_key_and_redirect endpoint, before getting redirected to POST to /accounts/register/. The problem was that validation was happening in the check_prereg_key_and_redirect part and not in /accounts/register/ - meaning that one could submit an expired confirmation key and be able to register. The issue is fixed in Zulip 4.8. There are no known workarounds and users are advised to upgrade as soon as possible."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-613: Insufficient Session Expiration"}]}]}, "references": {"reference_data": [{"name": "https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f", "refsource": "CONFIRM", "url": "https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f"}, {"name": "https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6", "refsource": "MISC", "url": "https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6"}]}, "source": {"advisory": "GHSA-wj76-pcqr-mf9f", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:03:08.967Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-43791", "datePublished": "2021-12-02T00:15:11.000Z", "dateReserved": "2021-11-16T00:00:00.000Z", "dateUpdated": "2024-08-04T04:03:08.967Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "zulip", "vendor": "zulip", "versions": [{"status": "affected", "version": "< 4.8"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*", "matchCriteriaId": "E0C73351-4711-4F7A-AD8F-84FC7FC67CF1", "versionEndExcluding": "4.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Zulip is an open source group chat application that combines real-time chat with threaded conversations. In affected versions expiration dates on the confirmation objects associated with email invitations were not enforced properly in the new account registration flow. A confirmation link takes a user to the check_prereg_key_and_redirect endpoint, before getting redirected to POST to /accounts/register/. The problem was that validation was happening in the check_prereg_key_and_redirect part and not in /accounts/register/ - meaning that one could submit an expired confirmation key and be able to register. The issue is fixed in Zulip 4.8. There are no known workarounds and users are advised to upgrade as soon as possible."}, {"lang": "es", "value": "Zulip es una aplicaci\u00f3n de chat de grupo de c\u00f3digo abierto que combina el chat en tiempo real con conversaciones en hilos. En las versiones afectadas, las fechas de caducidad de los objetos de confirmaci\u00f3n asociados a las invitaciones por correo electr\u00f3nico no se aplicaban correctamente en el flujo de registro de nuevas cuentas. Un enlace de confirmaci\u00f3n lleva al usuario al endpoint check_prereg_key_and_redirect, antes de ser redirigido a POST a /accounts/register/. El problema era que la comprobaci\u00f3n ocurr\u00eda en la parte check_prereg_key_and_redirect y no en /accounts/register/ - lo que significaba que uno pod\u00eda enviar una clave de confirmaci\u00f3n caducada y poder registrarse. El problema se ha corregido en Zulip versi\u00f3n 4.8. No se presentan soluciones conocidas y se aconseja a usuarios que actualicen lo antes posible"}], "id": "CVE-2021-43791", "lastModified": "2026-06-17T04:11:26.823", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-12-02T01:15:07.423", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-613"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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