XSS in Cal.com

CVE-2025-31604

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Cal.com Cal.com cal-com allows Stored XSS.This issue affects Cal.com: from n/a through <= 1.0.0.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (9.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-31604: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-31604?
CVE-2025-31604 is a medium-severity vulnerability in Cal.com, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.5/10. Published 2025-03-31.
How severe is CVE-2025-31604?
Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-31604 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.