CVE-2021-26073

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072", "name": "https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072", "tags": [], "refsource": ""}, {"url": "https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072", "name": "https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072", "tags": [], "refsource": ""}, {"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099", "name": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099", "tags": ["Vendor Advisory"], "refsource": ""}, {"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099", "name": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099", "tags": ["Vendor Advisory"], "refsource": ""}, {"url": "https://security.netapp.com/advisory/ntap-20210604-0004/", "name": "https://security.netapp.com/advisory/ntap-20210604-0004/", "tags": ["Third Party Advisory"], "refsource": ""}, {"url": "https://security.netapp.com/advisory/ntap-20210604-0004/", "name": "https://security.netapp.com/advisory/ntap-20210604-0004/", "tags": ["Third Party Advisory"], "refsource": ""}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "Broken Authentication in Atlassian Connect Express (ACE) from version 3.0.2 before version 6.6.0: Atlassian Connect Express is a Node.js package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Express app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Express versions from 3.0.2 before 6.6.0 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-287"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-26073", "ASSIGNER": "security@atlassian.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 4.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.1}}, "publishedDate": "2021-04-16T03:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:atlassian:connect_express:*:*:*:*:*:node.js:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "6.6.0", "versionStartIncluding": "3.0.2"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2025-02-12T21:15Z"}