CVE-2024-58355 Cal.com through 4.7.15 Cross-Site Scripting via booking questions
Attackers can inject malicious scripts via booking question labels, 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-2024-58355?
CVE-2024-58355 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 (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.
Weakness: CWE-80
Which versions are affected by CVE-2024-58355?
How do I fix CVE-2024-58355?
No fix has been published for CVE-2024-58355 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-2024-58355 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-58355 exists.
Sources
Also known as GHSA-884j-pvgh-233q.