{"id":"CVE-2020-35729","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-35729","generatedAt":"2026-10-27T22:26:29.253Z","title":"KLog Server 2.4.1 allows OS command injection via shell metacharacters in the actions/authenticate.php user parameter.","description":"KLog Server 2.4.1 allows OS command injection via shell metacharacters in the actions/authenticate.php user parameter.","published":"2020-12-27T05:15:12.000Z","lastModified":"2026-06-17T03:14:12.000Z","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-78"],"affected":["klogserver/klog server"],"epss":{"score":0.88099,"percentile":0.99764,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":2,"verified":true,"firstPublished":"2021-01-05","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":49474,"kind":"exploit","title":"Klog Server 2.4.1 - Unauthenticated Command Injection (Metasploit)","url":"https://www.exploit-db.com/exploits/49474","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/49474.rb","file":"exploits/php/webapps/49474.rb","published":"2021-01-25","added":"2021-01-25","updated":"2021-01-25","author":"Metin Yunus Kandemir","type":"webapps","platform":"php","port":null,"verified":true,"codes":["CVE-2020-35729"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null},{"edbId":49366,"kind":"exploit","title":"Klog Server 2.4.1 - Command Injection (Unauthenticated)","url":"https://www.exploit-db.com/exploits/49366","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/49366.py","file":"exploits/php/webapps/49366.py","published":"2021-01-05","added":"2021-01-05","updated":"2021-01-25","author":"B3KC4T","type":"webapps","platform":"php","port":null,"verified":true,"codes":["CVE-2020-35729"],"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 88.1%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/160798/Klog-Server-2.4.1-Command-Injection.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/161123/Klog-Server-2.4.1-Command-Injection.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/161410/Klog-Server-2.4.1-Command-Injection.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://github.com/mustgundogdu/Research/blob/main/KLOG_SERVER/Exploit_Code","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/mustgundogdu/Research/blob/main/KLOG_SERVER/README.md","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/160798/Klog-Server-2.4.1-Command-Injection.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/161123/Klog-Server-2.4.1-Command-Injection.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/161410/Klog-Server-2.4.1-Command-Injection.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/mustgundogdu/Research/blob/main/KLOG_SERVER/Exploit_Code","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/mustgundogdu/Research/blob/main/KLOG_SERVER/README.md","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-35729","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."}