CVE-2024-58355
CVE-2024-58355 is a high-severity vulnerability with a CVSS 3.x base score of 8.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-80.
Key facts
- Severity: High (CVSS 3.x base score 8.9)
- CVSS v4: 9.3
- EPSS exploit prediction: 0% (22nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-80
- Published:
- Last modified:
Description
Cal.com (calcom/cal.diy) versions through 4.7.15 contain a stored cross-site scripting vulnerability. The single booking view (e.g., https://app.cal.com/booking/<id>) renders booking-question field labels via React's dangerouslySetInnerHTML without sanitizing or escaping user input. An attacker who can create an event type with a malicious booking-question label can inject arbitrary HTML/JavaScript that executes when a victim opens the crafted booking URL. The issue is fixed in v4.7.16.
Frequently asked questions
- What is CVE-2024-58355?
- Cal.com (calcom/cal.diy) versions through 4.7.15 contain a stored cross-site scripting vulnerability. The single booking view (e.g., https://app.cal.com/booking/<id>) renders booking-question field labels via React's dangerouslySetInnerHTML without sanitizing or escaping user input. An attacker who can create an event type with a malicious booking-question label can inject arbitrary HTML/JavaScript that executes when a victim opens the crafted booking URL. The issue is fixed in v4.7.16.
- How severe is CVE-2024-58355?
- CVE-2024-58355 has a CVSS 3.x base score of 8.9, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
- Is CVE-2024-58355 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2024-58355?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2024-58355 published?
- CVE-2024-58355 was published on 2026-07-23 and last updated on 2026-07-30.
References
- https://github.com/calcom/cal.diy/commit/00689fda0a30b8f933c096f02c1fe092a4206def
- 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
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