WordPress Cal.com plugin <= 1.0.0 - Cross Site Scripting (XSS) vulnerability

6.5 CVSS

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Peter Thaleikis | Patchstack Bug Bounty Program

References

https://patchstack.com/database/Wordpress/Plugin/cal-com/vulnerability/wordpress-cal-com-plugin-1-0-0-cross-site-scripting-xss-vulnerability?_s_id=cve

Affected Vendor

Cal.com

View all reports →

Affected Software

Cal.com

Vulnerable Versions:

Timeline

Official Publish: March 31st, 2025

Last Modified: April 28th, 2026

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Weaknesses (CWE)

CWE-80

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

Initial Access

T1059 Command and Scripting Interpreter

Execution

T1552 Unsecured Credentials

Credential Access

T1071 Application Layer Protocol

Command and Control

T1565 Data Manipulation

Impact