CVE-2024-58355 CRITICAL

CVE-2024-58355: Cal.com through 4.7.15 Cross-Site Scripting via booking questions

Vendor Calcom
Product cal.diy
Weakness CWE-80 · XSS · basic
Published July 23, 2026
Last update July 24, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

What the vulnerability does

01Description

Cal.com (calcom/cal.diy) versions through 4.7.15 contain a stored cross-site scripting vulnerability. The single booking view (e.g., https://app.cal.com/booking/<id>) renders booking-question field labels via React's dangerouslySetInnerHTML without sanitizing or escaping user input. An attacker who can create an event type with a malicious booking-question label can inject arbitrary HTML/JavaScript that executes when a victim opens the crafted booking URL. The issue is fixed in v4.7.16.

Key dates

02Disclosure timeline

July 23, 2026 CVE published
July 24, 2026 Record updated