CVE-2024-58353 Cal.com through 4.7.15 Cross-Site Scripting via booking questions
Attackers can inject malicious scripts via booking question labels in Cal.com, leading to code execution or account takeover when victims view the booking page.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-58353?
CVE-2024-58353 is a critical cross-site scripting vulnerability in calcom cal.diy, published on 23 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-80
Which versions are affected by CVE-2024-58353?
How do I fix CVE-2024-58353?
No fix has been published for CVE-2024-58353 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-58353 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-58353 exists.
Sources
Also known as GHSA-mxrg-5554-pp4x.