PT-2023-32294 · WordPress · Live Chat With Facebook Messenger

István Márton + 1 · Published 2023-10-24 · Updated 2023-11-02 · CVE-2023-5740

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Live Chat with Facebook Messenger plugin for WordPress versions up to, and including, 1.0

Description The issue is related to Stored Cross-Site Scripting via the plugin's 'messenger' shortcode due to insufficient input sanitization and output escaping on user-supplied attributes. This allows 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.

Recommendations For versions up to, and including, 1.0, consider disabling the 'messenger' shortcode until a patch is available to prevent exploitation. Restrict access to the plugin's configuration to minimize the risk of unauthorized modifications. As a temporary workaround, limit contributor-level and above permissions to trusted users only. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-5740

Affected Products

Live Chat With Facebook Messenger

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2023-5740 · Security Note
• https://osv.dev/vulnerability/CVE-2023-5740 · Vendor Advisory
• https://wordfence.com/threat-intel/vulnerabilities/id/aa32a790-242f-4142-9f4d-e1b2a07045bb?source=cve · Note
• https://plugins.trac.wordpress.org/browser/wp-facebook-messenger/trunk/frontend/shortcode.php#L32 · Note
• https://plugins.trac.wordpress.org/browser/wp-facebook-messenger/trunk/frontend/shortcode.php#L22 · Note
• https://twitter.com/CVEnew/status/1716820462322495733 · Twitter Post
• https://t.me/cvenotify/60410 · Telegram Post
• https://t.me/cibsecurity/72854 · Telegram Post