CVE-2024-58355

HIGH

Cal.com through 4.7.15 Cross-Site Scripting via booking questions

Title source: cna

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.

References (3)

Core 3

Core References

Vendor Advisory vendor-advisory

GitHub Security Advisory (GHSA-vgj7-76cw-h6f8)

https://github.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8

Patch patch

https://github.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206def

View Patch ZIP pw:eip

Third Party Advisory third-party-advisory

VulnCheck Advisory: Cal.com through 4.7.15 Cross-Site Scripting via booking questions

https://www.vulncheck.com/advisories/cal-com-through-cross-site-scripting-via-booking-questions-2

Scores

CVSS v3 8.9

EPSS 0.0029

EPSS Percentile 21.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-80

Status published

Products (1)

calcom/cal.diy < 4.7.15

Published Jul 23, 2026

Tracked Since Jul 24, 2026