Stored Cross-Site Scripting Vulnerability in Appointmind Plugin by WordPress
CVE-2025-9851

5.4MEDIUM

Key Information:

Vendor

WordPress
Status
Appointmind
Vendor
CVE Published:
17 September 2025

What is CVE-2025-9851?

The Appointmind plugin for WordPress is prone to a Stored Cross-Site Scripting vulnerability via its 'appointmind_calendar' shortcode. This flaw, present in all versions up to and including 4.1.0, results from inadequate input sanitization and output escaping on attributes provided by users. As a consequence, authenticated users with contributor-level access and higher are able to inject malicious scripts into pages. These scripts can be executed in the browser of any user who accesses the compromised pages, posing a significant security risk.

Affected Version(s)

Appointmind * <= 4.1.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset?sfp_email=&s...

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Peter Thaleikis
.
CVE-2025-9851 : Stored Cross-Site Scripting Vulnerability in Appointmind Plugin by WordPress