What is CVE-2021-42663?

CVE-2021-42663 is a medium-severity vulnerability in Online Event Booking And Reservation System Project, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2021-11-05.

How severe is CVE-2021-42663?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2021-42663 known to be exploited?

11 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Online Event Booking And Reservation System Project

CVE-2021-42663

An HTML injection vulnerability exists in Sourcecodester Online Event Booking and Reservation System in PHP/MySQL via the msg parameter to /event-management/index.php. An attacker can leverage this vulnerability in order to change the visibility of the website. Once the target user clicks on a given link he will display the content of the HTML code of the attacker's choice.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.038 (89.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Affected products

Online_event_booking_and_reservation_system_project Online_event_booking_and_reservation_system — versions 2.3.0
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@mitre.org (Product, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-42663?: CVE-2021-42663 is a medium-severity vulnerability in Online Event Booking And Reservation System Project, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2021-11-05.
How severe is CVE-2021-42663?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2021-42663 known to be exploited?: 11 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.