{"id":"CVE-2021-42669","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-42669","generatedAt":"2026-11-05T00:59:08.396Z","title":"A file upload vulnerability exists in Sourcecodester Engineers Online Portal in PHP via dashboard_teacher.php, which allows changing the avatar through teacher_avatar.php.","description":"A file upload vulnerability exists in Sourcecodester Engineers Online Portal in PHP via dashboard_teacher.php, which allows changing the avatar through teacher_avatar.php. Once an avatar gets uploaded it is getting uploaded to the /admin/uploads/ directory, and is accessible by all users. By uploading a php webshell containing \"<?php system($_GET[\"cmd\"]); ?>\" the attacker can execute commands on the web server with - /admin/uploads/php-webshell?cmd=id.","published":"2021-11-05T13:15:09.000Z","lastModified":"2026-06-17T04:09:57.000Z","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":["engineers online portal project/engineers online portal"],"epss":{"score":0.2327,"percentile":0.97781,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 23.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://github.com/TheHackingRabbi/CVE-2021-42669","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.sourcecodester.com/php/13115/engineers-online-portal-php.html","tags":["Product","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/TheHackingRabbi/CVE-2021-42669","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.sourcecodester.com/php/13115/engineers-online-portal-php.html","tags":["Product","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-42669","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."}