CVE-2023-39991 HIGH

CVE-2023-39991: WordPress BigBlueButton Plugin <= 3.0.0-beta.4 is vulnerable to Cross Site Scripting (XSS)

Vendor Blindside Networks
Product BigBlueButton
Weakness CWE-79 · XSS
Published September 4, 2023
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in Blindside Networks BigBlueButton plugin <= 3.0.0-beta.4 versions.

Explanation of Vulnerability in Simple Terms

02Summary

BigBlueButton versions up to 3.0.0-beta.4 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts. An attacker can craft a malicious link or page that, when visited by a user, executes arbitrary JavaScript in the victim's browser within the BigBlueButton application context. This can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim.

What an attacker can do

03Attacker Capabilities

Inject and execute malicious JavaScript in a user's browser within the BigBlueButton application.

Potential impact on your site

04Site Impact

Users of BigBlueButton can have their sessions compromised, credentials stolen, or be tricked into performing unauthorized actions.

Conditions required to exploit

05Prerequisites

The victim must click a malicious link or visit an attacker-controlled page that triggers the XSS payload.

Key dates

06Disclosure timeline

September 4, 2023 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

CVE-2026-15665 Fluent Support <= 2.3.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'redirect-to' Shortcode Attribute CVE-2026-15730 GamiPress <= 7.9.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'heading_size' Shortcode Attribute CVE-2026-65511 WordPress Manual - Documentation, Knowledge Base & Education WordPress Theme theme <= 7.5.4 - Cross Site Scripting (XSS) vulnerability CVE-2026-15653 Visualizer <= 4.0.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'backend-title' Parameter CVE-2026-15464 WP Hotel Booking <= 2.3.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'widget_search' Shortcode Attribute