by Kastro
Paper/Archive/CVE-2024-58353

CVE-2024-58353

calcom cal.diy — Cal.com through 4.7.15 Cross-Site Scripting via booking questions

EPSS 0.4%public exploitCVSS 9.3
critical.is priorityof 100
45
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 35.9.359 × 207.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
cal.diy≤ 4.7.15–CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
VulnCheck (CNA)8.9CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitgithub.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8patchgithub.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206defwriteupvulncheck.com/advisories/cal-com-through-cross-site-scripting-via-booking-questions