BigBlueButton <= 3.0.0-beta.4 - Authenticated (Author+) Stored Cross-Site Scripting

Description

The BigBlueButton plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the the moderator code and viewer code fields in versions up to, and including, 3.0.0-beta.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with author privileges or higher to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Scores

EPSS (exploitation in 30 days)

0.29% · top 78% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.

Weakness

• CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• blindsidenetworks · BigBlueButton

  • affected ≤ 3.0.0-beta.4

References (2)

• https://www.wordfence.com/threat-intel/vulnerabilities/id/5f829d21-5347-46ec-9218-2b3cbe7d7b95?source=cve (opens in a new tab)
• https://plugins.trac.wordpress.org/browser/bigbluebutton/trunk/public/partials/bigbluebutton-join-display.php#L26 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-7296](https://trackcve.app/badge/CVE-2023-7296.svg)](https://trackcve.app/cve/CVE-2023-7296)

Record last updated 8 Apr 2026, 16:56 UTC.