{"id":"CVE-2021-27964","aliases":["EUVD-2021-14682","GHSA-mxm8-cmpq-g5cx"],"status":"published","title":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send...","description":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.47519,"percentile":0.9886,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-434"],"published":"2021-03-05T01:37:20Z","modified":"2026-06-17T03:45:40Z","exploits":[{"source":"exploitdb","id":"EDB-49651","title":"SonLogger 4.2.3.3 - Unauthenticated Arbitrary File Upload (Metasploit)","type":"webapps","platform":"multiple","date":"2021-03-15","verified":true,"url":"https://www.exploit-db.com/exploits/49651"},{"source":"nuclei","id":"CVE-2021-27964","title":"SonLogger - Arbitrary File Upload","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27964.yaml"}],"products":[{"vendor":"sfcyazilim","product":"sonlogger"}],"references":[{"url":"https://github.com/erberkan/SonLogger-vulns","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.sonlogger.com/releasenotes","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27964"},{"url":"https://github.com/advisories/GHSA-mxm8-cmpq-g5cx"}],"sources":{"cve":[{"id":"CVE-2021-27964","description":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.","status":"published","published":"2021-03-05T01:37:20Z","modified":"2024-08-03T21:33:16.816Z","updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-14682","description":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.","status":"published","published":"2021-03-05T01:37:20Z","modified":"2024-08-03T21:33:16Z","updated_at":"2026-11-03T03:24:48.366655Z"}],"ghsa":[{"id":"GHSA-mxm8-cmpq-g5cx","title":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send...","description":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.","status":"published","published":"2022-05-24T17:43:47Z","modified":"2023-01-29T05:05:34Z","cwes":["CWE-434"],"updated_at":"2026-11-02T14:45:49.842411Z"}],"nvd":[{"id":"CVE-2021-27964","description":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.","status":"published","published":"2021-03-05T02:15:12.52Z","modified":"2026-06-17T03:45:40.93Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:06:50.399901Z"}]}}