CVE-2021-42669

CriticalCVSS 9.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-434

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/TheHackingRabbi/CVE-2021-42669Exploit, Third Party Advisory
https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671Exploit, Third Party Advisory
https://www.sourcecodester.com/php/13115/engineers-online-portal-php.htmlProduct, Third Party Advisory
https://github.com/TheHackingRabbi/CVE-2021-42669Exploit, Third Party Advisory
https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671Exploit, Third Party Advisory
https://www.sourcecodester.com/php/13115/engineers-online-portal-php.htmlProduct, Third Party Advisory

Timeline

Published: Nov 5, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-42676.1A vulnerability classified as problematic was found in tad_discuss. Affected by this vulnerability is an unknown functionality. The manipula CVE-2021-426709.8A SQL injection vulnerability exists in Sourcecodester Engineers Online Portal in PHP via the id parameter to the announcements_student.php CVE-2021-426717.5An incorrect access control vulnerability exists in Sourcecodester Engineers Online Portal in PHP in nia_munoz_monitoring_system/admin/uploa CVE-2021-426759.8Kreado Kreasfero 1.5 does not properly sanitize uploaded files to the media directory. One can upload a malicious PHP file and obtain remote CVE-2021-42688.8A vulnerability, which was classified as problematic, was found in phpRedisAdmin up to 1.17.3. This affects an unknown part. The manipulatio CVE-2021-426818.8A Buffer Overflow vulnerability exists in Accops HyWorks DVM Tools prior to v3.3.1.105. The IOCTL Handler 0x22001B allows local attackers to CVE-2021-426828.8An Integer Overflow vulnerability exists in Accops HyWorks DVM Tools prior to v3.3.1.105 .The IOCTL Handler 0x22001B allows local attackers CVE-2021-426838.8A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22001B allows local attack CVE-2021-426858.8An Integer Overflow vulnerability exists in Accops HyWorks DVM Tools prior to v3.3.1.105 . The IOCTL Handler 0x22005B in the Accops HyWorks CVE-2021-426868.8An Integer Overflow exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22001B in the Accops HyWorks Windows C CVE-2021-426878.8A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22005B allows local attack CVE-2021-426888.8An Integer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22005B in the Accops HyW