# CVE-2024-58355: Cal.com stored XSS in booking question labels

Source: https://junglewise.ai/threats/cve-2024-58355-cal-com-stored-xss-in-booking-question-labels  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-23. Updated: 2026-07-23  
License: CC BY 4.0 with a link back

CVE-2024-58355 · Severity: high · CVSS 8.9 · Published 2026-07-23

Cal.com, an open-source scheduling platform, contains a security flaw in how it handles booking form questions. An attacker with an account can create a malicious booking link that, when viewed by another user, executes unauthorized code in their browser. This could allow an attacker to steal sensitive information, such as session cookies or API keys, from unsuspecting users or administrators.

Technologies: [Cal.Com](https://junglewise.ai/threats/technologies/cal-com). Vendors: [Cal.com](https://junglewise.ai/threats/vendors/cal-com).

## Quick answers

**Is CVE-2024-58355 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-58355 being exploited in the wild.

**How severe is CVE-2024-58355?** High severity, with a CVSS score of 8.9, published 23 July 2026.

**Which products and versions are affected?** Cal.Com <= 4.7.15.

**Is there a fix for CVE-2024-58355?** A patch was published on 2026-07-23: CVE published and fix confirmed in v4.7.16 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2024-58355 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2024-58355?** Check whether you run Cal.Com at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stored cross-site scripting (XSS) vulnerability exists in Cal.com versions up to 4.7.15. The vulnerability is located in the single booking view component, which renders booking-question field labels using React's 'dangerouslySetInnerHTML' attribute without proper sanitization or escaping. An attacker with low privileges (the ability to create an event type) can inject arbitrary HTML or JavaScript into a booking-question label. When a victim navigates to the resulting booking URL, the malicious payload executes in the context of their browser session. This can lead to the theft of sensitive data, including API keys and local storage content. The issue is resolved in version 4.7.16.

## Affected products

- Cal.com cal.diy <= 4.7.15

## Timeline

- 2024-12-03: disclosed: Vulnerability reported by researcher xyzeva
- 2024-12-04: advisory: GitHub Security Advisory published
- 2026-07-23: patched: CVE published and fix confirmed in v4.7.16

## References

- [https://github.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206def](https://github.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206def)
- [https://github.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8](https://github.com/calcom/cal.diy/security/advisories/GHSA-vgj7-76cw-h6f8)
- [https://www.vulncheck.com/advisories/cal-com-through-cross-site-scripting-via-booking-questions-2](https://www.vulncheck.com/advisories/cal-com-through-cross-site-scripting-via-booking-questions-2)

## Related threats

- [Cal.com authorization bypass in webhook handler](https://junglewise.ai/threats/cve-2026-112043-a-weakness-has-been-identified-in-calcom-cal-com-and-cal-diy-up)
- [Cal.com credentials delete cross-team privilege escalation](https://junglewise.ai/threats/cve-2026-109143-a-vulnerability-was-determined-in-calcom-cal-com-and-cal-diy-up)
- [Cal.com remote code execution via Next.js RSC deserialization](https://junglewise.ai/threats/cve-2025-71389-cal-com-remote-code-execution-via-next-js-rsc-deserialization)
- [Calcom cal.diy repository takeover via GitHub Actions pull_request_target](https://junglewise.ai/threats/cve-2024-58354-calcom-cal-diy-repository-takeover-via-github-actions-pull)
- [Cal.com cal.diy stored XSS in booking question labels](https://junglewise.ai/threats/cve-2024-58353-cal-com-cal-diy-stored-xss-in-booking-question-labels)