Facebook Chat Plugin <= 1.2 - Cross-Site Request Forgery to Site Settings Changes
Strategic Overview
- Status
- Patched in 1.3
- Affected Plugin
- Facebook Chat Plugin – Live Chat Plugin for WordPress
- Affected Version
< 1.3- CVSS
- 4.3Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE pending
At a glance
This record tracks a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Facebook Chat Plugin WordPress plugin, affecting versions < 1.3. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.3; sites on affected versions should update now. Disclosed June 2019.
Vulnerability Overview
The Facebook Chat Plugin plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.2. This makes it possible for unauthenticated attackers to change site settings via forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-352: Cross-Site Request Forgery (CSRF)
Reaching this weakness in Facebook Chat Plugin < 1.3 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.
An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Facebook Chat Plugin the fix is 1.3: builds < 1.3 are affected, anything from 1.3 onward is not.
Remediation
Update to version 1.3, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Facebook Chat Plugin: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Facebook Chat Plugin 1.3 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in Facebook Chat Plugin – Live Chat Plugin for WordPress
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