What the vulnerability does
01Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Simpma Embed Calendly embed-calendly-scheduling allows Stored XSS.This issue affects Embed Calendly: from n/a through <= 4.4.
Explanation of Vulnerability in Simple Terms
02Summary
Embed Calendly versions 4.4 and earlier contain a cross-site scripting vulnerability that allows an authenticated attacker to inject malicious scripts. The vulnerability requires user interaction and affects the integrity and confidentiality of site data. Site administrators should update to a version newer than 4.4 to remediate this issue.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers when they interact with the plugin.
Potential impact on your site
04Site Impact
Authenticated users' sessions and data could be compromised if they interact with attacker-controlled content within the plugin.
Conditions required to exploit
05Prerequisites
Attacker must have low-level authentication (e.g., subscriber or contributor role) and trick a user into clicking a malicious link or visiting a crafted page.
Key dates
06Disclosure timeline
March 13, 2026
CVE published
April 29, 2026
Record updated