CVE-2025-5258 MEDIUM

CVE-2025-5258: Conference Scheduler <= 2.5.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via className Parameter

Vendor Swift
Product Conference Scheduler
Weakness CWE-79 · XSS
Published June 24, 2025
Last update April 8, 2026

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The Conference Scheduler plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘className’ parameter in all versions up to, and including, 2.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Explanation of Vulnerability in Simple Terms

02Summary

Conference Scheduler versions up to 2.5.1 contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has a changed scope, meaning the impact can extend beyond the vulnerable component to affect other users or parts of the application. Low-privileged accounts can exploit this without user interaction.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that execute in other users' browsers and affect other parts of the application.

Potential impact on your site

04Site Impact

Authenticated users can inject scripts affecting other users' sessions and data; site integrity compromised.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege user account; no user interaction required.

Key dates

06Disclosure timeline

June 24, 2025 CVE published
April 8, 2026 Record updated