{"id":"CVE-2021-42663","aliases":["EUVD-2021-29624","GHSA-948r-pr54-gh74"],"status":"published","title":"An HTML injection vulnerability exists in Sourcecodester Online Event Booking and Reservation...","description":"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.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.03852,"percentile":0.90284,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-74","CWE-79"],"published":"2021-11-05T12:17:30Z","modified":"2026-06-17T04:09:55Z","exploits":[{"source":"nuclei","id":"CVE-2021-42663","title":"Sourcecodester Online Event Booking and Reservation System 2.3.0 - Cross-Site Scripting","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-42663.yaml"},{"source":"pocgithub","id":"0xDeku/CVE-2021-42663","title":"0xDeku/CVE-2021-42663","date":"2021-11-03","url":"https://github.com/0xDeku/CVE-2021-42663"}],"products":[{"vendor":"online_event_booking_and_reservation_system_project","product":"online_event_booking_and_reservation_system"}],"references":[{"url":"https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.html","tags":["x_refsource_MISC","x_transferred","Product","Third Party Advisory"]},{"url":"https://github.com/TheHackingRabbi/CVE-2021-42663","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42663"},{"url":"https://github.com/advisories/GHSA-948r-pr54-gh74"}],"sources":{"cve":[{"id":"CVE-2021-42663","description":"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.","status":"published","published":"2021-11-05T12:17:30Z","modified":"2024-08-04T03:38:49.5Z","updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29624","description":"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.","status":"published","published":"2021-11-05T12:17:30Z","modified":"2024-08-04T03:38:49Z","updated_at":"2026-11-03T03:24:15.755984Z"}],"ghsa":[{"id":"GHSA-948r-pr54-gh74","title":"An HTML injection vulnerability exists in Sourcecodester Online Event Booking and Reservation...","description":"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.","status":"published","published":"2022-05-24T19:19:51Z","modified":"2023-01-27T05:03:42Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:42:18.285263Z"}],"nvd":[{"id":"CVE-2021-42663","description":"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.","status":"published","published":"2021-11-05T13:15:07.63Z","modified":"2026-06-17T04:09:55.85Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:00.549994Z"}]}}