CVE-2021-42662

Name: CVE-2021-42662
Creator: NVD / NIST
Published: 2021-11-05T11:15:08.007+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.65%

Last modified Jun 17, 2026

CVE-2021-42662 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A Stored Cross Site Scripting (XSS) vulnerability exists in Sourcecodester Online Event Booking and Reservation System in PHP/MySQL via the Holiday reason parameter. 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) vulnerability exists in Sourcecodester Online Event Booking and Reservation System in PHP/MySQL via the Holiday reason parameter. 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
Online Event Booking And Reservation System Project	Online Event Booking And Reservation System	2.3.0

References

http://packetstormsecurity.com/files/164615/Online-Event-Booking-And-Reservation-System-1.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/TheHackingRabbi/CVE-2021-42662Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/50450Exploit, Third Party Advisory, VDB Entry
https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.htmlProduct, Third Party Advisory
http://packetstormsecurity.com/files/164615/Online-Event-Booking-And-Reservation-System-1.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/TheHackingRabbi/CVE-2021-42662Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/50450Exploit, Third Party Advisory, VDB Entry
https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.htmlProduct, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-42662?

How severe is CVE-2021-42662?

CVE-2021-42662 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-2021-42662?

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-2021-42662?

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

Scan your code now

Source: NVD / NIST