What is CVE-2024-58353?

CVE-2024-58353 is a high-severity vulnerability in Calcom Cal.diy, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 8.9/10. Published 2026-07-23.

How severe is CVE-2024-58353?

High severity. CVSS v3 base score is 8.9 out of 10.

XSS in Calcom Cal.diy

CVE-2024-58353

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 dange…

CVSS v3 metric

CVSS v3 base score 8.9 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L.

Affected products

Calcom Cal.diy — versions 0

Weakness classification (CWE)

CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2024-58353?: CVE-2024-58353 is a high-severity vulnerability in Calcom Cal.diy, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 8.9/10. Published 2026-07-23.
How severe is CVE-2024-58353?: High severity. CVSS v3 base score is 8.9 out of 10.