CVE-2024-58355

calcom cal.diyVulnerabilityCVSS 9.3

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/ ) 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.

No public exploitation has been reported so far. No distribution fix is listed yet; apply vendor mitigations and monitor.

Recommended action: Track your distribution's security tracker and apply the fix as soon as it ships.

CVE-2024-58355 calcom cal.diy Vulnerability

Severity metrics

CVSS 4.0 : 9.3 CRITICAL · CVSS 3.1 : 8.9 HIGH

Attack vectorNetwork (remote)

Attack complexityLow

Attack requirementsNone

Privileges requiredLow

User interactionPassive

Confidentiality impactHigh

Integrity impactHigh

Availability impactLow

Subsequent confidentialityHigh

Subsequent integrityHigh

Subsequent availabilityLow

Vector: AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

Affected & fixed versions by distribution

Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.

No affected package in the tracked watchlist yet (Debian, Ubuntu, Arch, SUSE, Red Hat...). Triage may still be pending.

Sources

Advisory NVD CVE.org

Published 2026-07-23 · updated 2026-07-26 · source: NVD