CVE-2024-58353: Cal.com (repository calcom/cal.diy) in versions ). Booking
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-58353
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2024-583530.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-58353 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Cal.com
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalCVE-2025-71389: Cal.com (calcom/cal.diy) before 5.9.9 is vulnerable to unauthenticated remote code execution b…nvd · 2026-07-23
- highCVE-2024-58355: Cal.com (calcom/cal.diy) versions through 4.7.15 contain a stored cross-site scripting vulnera…nvd · 2026-07-23
- criticalCVE-2024-58354: cal.com (calcom repository, later renamed cal.diy) is affected by a repository takeover vulner…nvd · 2026-07-23
- criticalCVE-2026-16624: Cal.com OSS ships lacks authorization on webhook teamId creation, allowing any authenticated u…nvd · 2026-07-22
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