Formilla Live Chat <= 1.3.0 - Authenticated (Administrator+) Cross-Site Scripting via 'FormillaID'
Strategic Overview
- Status
- Patched in 1.3.1
- Affected Plugin
- Live Chat by Formilla – Real-time Chat & Chatbots Plugin
- Affected Version
<= 1.3.0- CVSS
- 4.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2023-23727
At a glance
CVE-2023-23727 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Live Chat by Formilla WordPress plugin, affecting versions <= 1.3.0. It carries a CVSS score of 4.4 (reachable over the network). Exploitation requires an authenticated account at Administrator level or above. The issue is fixed in version 1.3.1; sites on affected versions should update now. Disclosed April 2023, reported by yuyudhn.
Vulnerability Overview
The Formilla Chat and Marketing Automation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'FormillaID' parameter in versions up to, and including, 1.3.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Live Chat by Formilla <= 1.3.0 carries this weakness at FormillaID, and reaching it takes an account at Administrator level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Live Chat by Formilla the fix is 1.3.1: builds <= 1.3.0 are affected, anything from 1.3.1 onward is not.
Remediation
Update to version 1.3.1, or a newer patched version
How does WordSec protect against this?
An attacker needs Administrator access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Live Chat by Formilla 1.3.1 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C