{"id":"CVE-2020-5846","aliases":["EUVD-2020-27000","GHSA-wmc6-394v-6mrx"],"status":"published","title":"An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0...","description":"An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0.30 via a \"PUT /obs/obm7/file/upload\" request with the base64-encoded pathname in the X-RSW-custom-encode-path HTTP header, and the content in the HTTP request body. It is possible to upload a file into any directory of the server. One can insert a JSP shell into the web server's directory and execute it. This leads to full system access as the configured user (e.g., Administrator) when starting from any authenticated session (e.g., a trial account). This is fixed in the 83/830122/cbs-*-hotfix-task26000 builds.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01399,"percentile":0.72667,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2020-01-06T20:11:38Z","modified":"2026-06-17T03:22:19Z","products":[{"vendor":"ahsay","product":"cloud_backup_suite"}],"references":[{"url":"https://www.wbsec.nl/ahsay-2/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5846"},{"url":"https://github.com/advisories/GHSA-wmc6-394v-6mrx"}],"sources":{"cve":[{"id":"CVE-2020-5846","description":"An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0.30 via a \"PUT /obs/obm7/file/upload\" request with the base64-encoded pathname in the X-RSW-custom-encode-path HTTP header, and the content in the HTTP request body. It is possible to upload a file into any directory of the server. One can insert a JSP shell into the web server's directory and execute it. This leads to full system access as the configured user (e.g., Administrator) when starting from any authenticated session (e.g., a trial account). This is fixed in the 83/830122/cbs-*-hotfix-task26000 builds.","status":"published","published":"2020-01-06T20:11:38Z","modified":"2024-08-04T08:39:25.93Z","updated_at":"2026-11-02T14:35:47.56691Z"}],"euvd":[{"id":"EUVD-2020-27000","description":"An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0.30 via a \"PUT /obs/obm7/file/upload\" request with the base64-encoded pathname in the X-RSW-custom-encode-path HTTP header, and the content in the HTTP request body. It is possible to upload a file into any directory of the server. One can insert a JSP shell into the web server's directory and execute it. This leads to full system access as the configured user (e.g., Administrator) when starting from any authenticated session (e.g., a trial account). This is fixed in the 83/830122/cbs-*-hotfix-task26000 builds.","status":"published","published":"2020-01-06T20:11:38Z","modified":"2024-08-04T08:39:25Z","updated_at":"2026-11-03T03:08:05.705852Z"}],"ghsa":[{"id":"GHSA-wmc6-394v-6mrx","title":"An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0...","description":"An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0.30 via a \"PUT /obs/obm7/file/upload\" request with the base64-encoded pathname in the X-RSW-custom-encode-path HTTP header, and the content in the HTTP request body. It is possible to upload a file into any directory of the server. One can insert a JSP shell into the web server's directory and execute it. This leads to full system access as the configured user (e.g., Administrator) when starting from any authenticated session (e.g., a trial account). This is fixed in the 83/830122/cbs-*-hotfix-task26000 builds.","status":"published","published":"2022-05-24T17:05:42Z","modified":"2023-01-29T05:01:00Z","updated_at":"2026-11-02T14:44:43.065987Z"}],"nvd":[{"id":"CVE-2020-5846","description":"An insecure file upload and code execution issue was discovered in Ahsay Cloud Backup Suite 8.3.0.30 via a \"PUT /obs/obm7/file/upload\" request with the base64-encoded pathname in the X-RSW-custom-encode-path HTTP header, and the content in the HTTP request body. It is possible to upload a file into any directory of the server. One can insert a JSP shell into the web server's directory and execute it. This leads to full system access as the configured user (e.g., Administrator) when starting from any authenticated session (e.g., a trial account). This is fixed in the 83/830122/cbs-*-hotfix-task26000 builds.","status":"published","published":"2020-01-06T21:15:11.737Z","modified":"2026-06-17T03:22:19.617Z","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","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:05:52.385274Z"}]}}