{"id":"CVE-2021-41243","aliases":["EUVD-2021-2476","GHSA-7rpc-9m88-cf9w"],"status":"published","title":"OS Command Injection Vulnerability and Potential Zip Slip Vulnerability","description":"There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted zip files which may execute arbitrary commands on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.02173,"percentile":0.8254,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-78"],"published":"2021-11-26T17:55:09Z","modified":"2026-10-20T10:53:58Z","fixes":[{"ecosystem":"Packagist","package":"baserproject/basercms","fixed_in":["4.5.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"baserproject/basercms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.4"}]}]},{"source":"osv","ecosystem":"Packagist","package":"baserproject/basercms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.4"}]}],"versions":["0.0.1","0.0.2","0.0.3","0.0.4","0.0.5","0.0.6","0.0.7","0.0.8","1.0.0","2.0.0-rc1","2.0.0-rc2","2.0.0-rc3","2.0.0-rc4","2.0.0-rc5","2.0.0-rc6","3.0.10","3.0.10.1","3.0.11","3.0.11.1","3.0.12","3.0.13","3.0.14","3.0.15","3.0.16","3.0.17","3.0.18","3.0.19","3.0.20","3.0.21","3.0.22","3.0.23","3.0.24","3.0.25","3.0.26","3.0.7","3.0.7.1","3.0.8","3.0.8.1","3.0.9","3.0.9.1","4.0.0","4.0.0-beta","4.0.1","4.0.10","4.0.10.1","4.0.11","4.0.2","4.0.2.1","4.0.3","4.0.4","4.0.5","4.0.5.1","4.0.5.2","4.0.6","4.0.7","4.0.8","4.0.9","4.1.0","4.1.0.1","4.1.1","4.1.2","4.1.3","4.1.4","4.1.5","4.1.6","4.1.7","4.1.8","4.2.0","4.2.1","4.2.2","4.2.3","4.2.4","4.2.5","4.3.0","4.3.1","4.3.2","4.3.3","4.3.4","4.3.5","4.3.6","4.3.7","4.3.7.1","4.4.0","4.4.1","4.4.1.1","4.4.2","4.4.2.1","4.4.3","4.4.4","4.4.5","4.4.6","4.4.7","4.4.8","4.5.0","4.5.1","4.5.2","4.5.3"]}],"products":[{"vendor":"basercms","product":"basercms"},{"vendor":"baserproject","product":"basercms"}],"references":[{"url":"https://github.com/baserproject/basercms/security/advisories/GHSA-7rpc-9m88-cf9w","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/baserproject/basercms/commit/9088b99c329d1faff3a2f1269f37b9a9d8d5f6ff","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41243","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-7rpc-9m88-cf9w"},{"url":"https://github.com/baserproject/basercms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-41243","title":"OS Command Injection Vulnerability and Potential Zip Slip Vulnerability","description":"There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted zip files which may execute arbitrary commands on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.","status":"published","published":"2021-11-26T17:55:09Z","modified":"2024-08-04T03:08:31.498Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:32:59.105382Z"}],"euvd":[{"id":"EUVD-2021-2476","description":"There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted zip files which may execute arbitrary commands on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.","status":"published","published":"2021-11-26T17:55:09Z","modified":"2024-08-04T03:08:31Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical"}],"updated_at":"2026-11-03T03:24:18.226903Z"}],"ghsa":[{"id":"GHSA-7rpc-9m88-cf9w","title":"OS Command Injection Vulnerability and Potential Zip Slip Vulnerability in baserCMS","description":"There is an OS Command Injection Vulnerability on the management system of baserCMS.\n\nThis is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users.\nIf you are eligible, please update to the new version as soon as possible.\n\nTarget\nbaserCMS 4.5.3 and earlier versions\n\nVulnerability\nOS Command Injection Vulnerability.\n\nCountermeasures\nUpdate to the latest version of baserCMS\n\nCredits\nAkagi Yusuke @NTT-ME","status":"published","published":"2021-12-01T18:29:42Z","modified":"2023-02-01T05:06:25Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:36:39.086869Z"}],"nvd":[{"id":"CVE-2021-41243","description":"There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted zip files which may execute arbitrary commands on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.","status":"published","published":"2021-11-26T18:15:07.253Z","modified":"2026-06-17T04:08:09.647Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:01.428028Z"}],"osv":[{"id":"CVE-2021-41243","description":"There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted zip files which may execute arbitrary commands on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.","status":"published","published":"2021-11-26T18:15:07.253Z","modified":"2026-10-20T10:53:58.508349025Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.557945Z"},{"id":"GHSA-7rpc-9m88-cf9w","title":"OS Command Injection Vulnerability and Potential Zip Slip Vulnerability in baserCMS","description":"There is an OS Command Injection Vulnerability on the management system of baserCMS.\n\nThis is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users.\nIf you are eligible, please update to the new version as soon as possible.\n\nTarget\nbaserCMS 4.5.3 and earlier versions\n\nVulnerability\nOS Command Injection Vulnerability.\n\nCountermeasures\nUpdate to the latest version of baserCMS\n\nCredits\nAkagi Yusuke @NTT-ME","status":"published","published":"2021-12-01T18:29:42Z","modified":"2026-09-10T03:49:27.350135875Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","level":"critical"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:46:41.349637Z"}]}}