CVE-2024-58355

CRITICAL9.3

Cal.com through 4.7.15 Cross-Site Scripting via booking questions

Published Jul 23, 2026

Modified 3 weeks ago

Details

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.

References

FIX

https://github.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206def

ADVISORY

https://github.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2024-58355

ADVISORY

https://www.vulncheck.com/advisories/cal-com-through-cross-site-scripting-via-booking-questions-2

CVSS Analysis

CVSS v4.0

9.3