CVE-2024-58353
Cal.com through 4.7.15 Cross-Site Scripting via booking questions
- State
- Published
- Severity
- 9.3 Critical
- Published
- Jul 23, 2026
- Updated
- Jul 28, 2026
- Reserved
- Jun 8, 2026
Description
Cal.com (repository calcom/cal.diy) in versions <= 4.7.15 is vulnerable to cross-site scripting (XSS) on the publicly accessible single booking view (e.g., /booking/<id>). Booking question (form field) labels are rendered via React's dangerouslySetInnerHTML without proper input sanitization or CSP, so an attacker who can create an event type with a malicious booking question label can inject arbitrary HTML/JavaScript that executes when a victim visits the booking view URL. Self-hosted instances with open registration are particularly at risk. The issue is fixed in version 4.7.16.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | 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 | VulnCheck |
| 3.1 | 8.9 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L | VulnCheck |
Weaknesses
- CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Affected Products
| Product | Versions |
|---|---|
cal.diycalcom |
|
References
- GitHub Security Advisory (GHSA-vgj7-76cw-h6f8)vendor-advisory
- Patch Commitpatch
- VulnCheck Advisory: Cal.com through 4.7.15 Cross-Site Scripting via booking questionsthird-party-advisory
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