# CVE-2024-58353: Cal.com through 4.7.15 Cross-Site Scripting via booking questions

> Attackers can inject malicious scripts via booking question labels in Cal.com, leading to code execution or account takeover when victims view the booking page.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Jul 2026
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-mxrg-5554-pp4x

## What is CVE-2024-58353?

CVE-2024-58353 is a critical cross-site scripting vulnerability in calcom cal.diy, published on 23 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## Which versions are affected by CVE-2024-58353?


## How do I fix CVE-2024-58353?

No fix has been published for CVE-2024-58353 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-58353 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-58353 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-58353 and fix it if it is affected.

What it is: CVE-2024-58353 is a critical cross-site scripting vulnerability in calcom cal.diy, published on 23 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-58353 exists.

Affected product: calcom cal.diy. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-58353/ (Markdown: https://insights.sbomify.com/CVE-2024-58353/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-58353
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-58353
- OSV: https://osv.dev/vulnerability/CVE-2024-58353

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-58353/
Summaries are generated and may contain mistakes; the official description above is the record.