PT-2021-23650 · Unknown · Sourcecodester Engineers Online Portal

0Xdeku + 1 · Published 2021-11-05 · Updated 2021-11-29 · CVE-2021-42669

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Sourcecodester Engineers Online Portal (affected versions not specified)

Description A file upload issue exists, allowing attackers to change the avatar through teacher avatar.php in dashboard teacher.php. Uploaded files are stored in the /admin/uploads/ directory and are accessible to all users. An attacker can upload a PHP webshell containing <?php system($ GET["cmd"]); ?> and execute commands on the web server by accessing the uploaded file, for example, /admin/uploads/php-webshell?cmd=id. This allows for command execution with potentially elevated privileges.

Recommendations As a temporary workaround, consider disabling the teacher avatar.php functionality until a patch is available. Restrict access to the /admin/uploads/ directory to minimize the risk of exploitation. Avoid using the cmd parameter in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-42669

Affected Products

Sourcecodester Engineers Online Portal

References · 5

• 🔥 https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671 · Exploit
• 🔥 https://github.com/TheHackingRabbi/CVE-2021-42669 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-42669 · Security Note
• https://t.me/cibsecurity/31873 · Telegram Post
• https://sourcecodester.com/php/13115/engineers-online-portal-php.html · Note