CVE-2021-42664

Name: CVE-2021-42664
Creator: NVD / NIST
Published: 2021-11-05T13:15:08.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.65%

Last modified Jun 17, 2026

CVE-2021-42664 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A Stored Cross Site Scripting (XSS) Vulneraibiilty exists in Sourcecodester Engineers Online Portal in PHP via the (1) Quiz title and (2) quiz description parameters to add_quiz.php. An attacker can leverage this vulnerability in order to run javascript commands on the web server surfers behalf, which can lead to cookie stealing and more.. EPSS estimates a 1.65% chance of exploitation in the next 30 days.

Description

A Stored Cross Site Scripting (XSS) Vulneraibiilty exists in Sourcecodester Engineers Online Portal in PHP via the (1) Quiz title and (2) quiz description parameters to add_quiz.php. An attacker can leverage this vulnerability in order to run javascript commands on the web server surfers behalf, which can lead to cookie stealing and more.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.65%

73.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Engineers Online Portal Project	Engineers Online Portal	1.0

References

http://packetstormsecurity.com/files/164618/Engineers-Online-Portal-1.0-SQL-Injection.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/TheHackingRabbi/CVE-2021-42664Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/50451Exploit, Third Party Advisory, VDB Entry
https://www.sourcecodester.com/php/13115/engineers-online-portal-php.htmlProduct, Third Party Advisory
http://packetstormsecurity.com/files/164618/Engineers-Online-Portal-1.0-SQL-Injection.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/TheHackingRabbi/CVE-2021-42664Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/50451Exploit, Third Party Advisory, VDB Entry
https://www.sourcecodester.com/php/13115/engineers-online-portal-php.htmlProduct, Third Party Advisory

Timeline

Published: Nov 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42664?

How severe is CVE-2021-42664?

CVE-2021-42664 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.65% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42664?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42664?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST