{"id":"CVE-2021-41279","aliases":["EUVD-2021-2442","GHSA-4x2f-54wr-4hjg"],"status":"published","title":"Zip Slip Vulnerability in BaserCMS","description":"BaserCMS is an open source content management system with a focus on Japanese language support. In affected versions users with upload privilege may upload crafted zip files capable of path traversal 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":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01616,"percentile":0.7634,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2021-11-26T18:00:11Z","modified":"2026-10-20T10:53:59Z","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-4x2f-54wr-4hjg","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/baserproject/basercms/commit/d8ab0a81a7bce35cc95ff7dff851a7e87a084336","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41279","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4x2f-54wr-4hjg"},{"url":"https://github.com/baserproject/basercms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-41279","title":"Zip Slip Vulnerability in BaserCMS","description":"BaserCMS is an open source content management system with a focus on Japanese language support. In affected versions users with upload privilege may upload crafted zip files capable of path traversal 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":"2021-11-26T18:00:11Z","modified":"2024-08-04T03:08:31.643Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:32:59.430294Z"}],"euvd":[{"id":"EUVD-2021-2442","description":"BaserCMS is an open source content management system with a focus on Japanese language support. In affected versions users with upload privilege may upload crafted zip files capable of path traversal 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":"2021-11-26T18:00:11Z","modified":"2024-08-04T03:08:31Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-03T03:24:18.226903Z"}],"ghsa":[{"id":"GHSA-4x2f-54wr-4hjg","title":"Potential Zip Slip Vulnerability in baserCMS","description":"There is a 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\nDaniele Scanu @SoterItSecurity","status":"published","published":"2021-12-01T18:29:32Z","modified":"2023-02-01T05:06:30Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:36:39.086869Z"}],"nvd":[{"id":"CVE-2021-41279","description":"BaserCMS is an open source content management system with a focus on Japanese language support. In affected versions users with upload privilege may upload crafted zip files capable of path traversal 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":"2021-11-26T18:15:07.32Z","modified":"2026-06-17T04:08:13.88Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","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-22"],"updated_at":"2026-11-02T14:07:01.428028Z"}],"osv":[{"id":"CVE-2021-41279","description":"BaserCMS is an open source content management system with a focus on Japanese language support. In affected versions users with upload privilege may upload crafted zip files capable of path traversal 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":"2021-11-26T18:15:07.32Z","modified":"2026-10-20T10:53:59.42308701Z","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-4x2f-54wr-4hjg","title":"Potential Zip Slip Vulnerability in baserCMS","description":"There is a 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\nDaniele Scanu @SoterItSecurity","status":"published","published":"2021-12-01T18:29:32Z","modified":"2026-09-10T03:49:16.254396144Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:37.528068Z"}]}}