{"id":"CVE-2021-27964","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-27964","generatedAt":"2026-10-27T22:26:27.757Z","title":"SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload.","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.","published":"2021-03-05T02:15:13.000Z","lastModified":"2026-06-17T03:45:41.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-434"],"affected":["sfcyazilim/sonlogger"],"epss":{"score":0.47519,"percentile":0.98835,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2021-03-15","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":49651,"kind":"exploit","title":"SonLogger 4.2.3.3 - Unauthenticated Arbitrary File Upload (Metasploit)","url":"https://www.exploit-db.com/exploits/49651","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/49651.rb","file":"exploits/multiple/webapps/49651.rb","published":"2021-03-15","added":"2021-03-15","updated":"2021-03-15","author":"Berkan Er","type":"webapps","platform":"multiple","port":null,"verified":true,"codes":["CVE-2021-27964"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 47.5%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://github.com/erberkan/SonLogger-vulns","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.sonlogger.com/releasenotes","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/erberkan/SonLogger-vulns","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.sonlogger.com/releasenotes","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-27964","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}