Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| calcom | cal.diy | ≤ 4.7.15 | — |
References
- GitHub Security Advisory (GHSA-vgj7-76cw-h6f8) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: Cal.com through 4.7.15 Cross-Site Scripting via booking questions third-party-advisory