CVE-2023-5740

MEDIUM 6.4

Live Chat with Facebook Messenger <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

The Live Chat with Facebook Messenger plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'messenger' shortcode in all versions up to, and including, 1.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CWE	CWE-79
Vendor	ninjateam
Product	live chat with facebook messenger
Published	Oct 24, 2023
Last Updated	Apr 8, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

ninjateam / Live Chat with Facebook Messenger

0 ≤ 1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/aa32a790-242f-4142-9f4d-e1b2a07045bb?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-facebook-messenger/trunk/frontend/shortcode.php#L22 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-facebook-messenger/trunk/frontend/shortcode.php#L32

Credits

István Márton