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CVE-2024-58353

8.9 · HIGH

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>).

Published Jul 23, 2026CWE-80EPSS 0.41%

Overview

CVE-2024-58353 is a high-severity vulnerability. It was published on July 23, 2026 and has a CVSS 3.1 base score of 8.9 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206defGitHubgithub.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8Refwww.vulncheck.com/advisories/cal-com-through-cross-site-scripting-via-booking-questionsGitHubgithub.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8

How CyberStrike helps

Frequently asked questions

What is CVE-2024-58353?

CVE-2024-58353 is a high-severity vulnerability. It was published on July 23, 2026 and has a CVSS 3.1 base score of 8.9 (HIGH).

How severe is CVE-2024-58353?

This vulnerability has a CVSS 3.1 base score of 8.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-58353?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-58353?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-58353 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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