CVE-2021-42669

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.

CVSS v3.1

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

CVSS v2.0

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

23.27% chance of exploitation in the next 30 days, 98th percentile

Published

2021-11-05

Updated

2024-08-04

Proof-of-concept exploits (3)

• TheHackingRabbi/CVE-2021-426692★ · 2022-07-12
• nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671
• 0xDeku/CVE-2021-426692★ · 2022-07-12

References

• CVE Record
• NVD entry

Related

• CVE-2021-42662
• CVE-2021-42663
• CVE-2021-42664
• CVE-2021-42665
• CVE-2021-42666
• CVE-2021-42667