High severity · published Jul 23, 2026
CVE-2024-58353
Cal.com through 4.7.15 Cross-Site Scripting via booking questions
8.9
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
cal.diy · calcom
through 4.7.15 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-58353
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-58353
github.com
https://github.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206def
github.com
https://github.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8
www.vulncheck.com
https://www.vulncheck.com/advisories/cal-com-through-cross-site-scripting-via-booking-questions
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