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Vulnerability record · CVE-2021-42662 · published 5 November 2021

CVE-2021-42662: Online event booking and reservation system project online event booking and reservation system cross-site scripting vulnerability

OOnline Event Booking And Reservation System Project · Online Event Booking And Reservation System

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.

5.4 CVSS 3.1 Medium EPSS 1.7% · top 24.1% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 6 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/164615/Online-Event-Booking-And-Reservation-System-1.0-Cross-Site-Scripting.html ExploitThird Party AdvisoryVDB Entry
https://github.com/TheHackingRabbi/CVE-2021-42662 ExploitThird Party Advisory
https://www.exploit-db.com/exploits/50450 ExploitThird Party AdvisoryVDB Entry
https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.html ProductThird Party Advisory
http://packetstormsecurity.com/files/164615/Online-Event-Booking-And-Reservation-System-1.0-Cross-Site-Scripting.html ExploitThird Party AdvisoryVDB Entry
https://github.com/TheHackingRabbi/CVE-2021-42662 ExploitThird Party Advisory
https://www.exploit-db.com/exploits/50450 ExploitThird Party AdvisoryVDB Entry
https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.html ProductThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-42662), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.