CBX Currency Converter <= 3.0.3 - Cross-Site Request Forgery leading to Plugin Settings Leakage/Changes
Strategic Overview
- Status
- Patched in 3.0.4
- Affected Plugin
- CBX Currency Converter
- Affected Version
<= 3.0.3- CVSS
- 5.4Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2023-28747
At a glance
CVE-2023-28747 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the CBX Currency Converter WordPress plugin, affecting versions <= 3.0.3. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.0.4; sites on affected versions should update now. Disclosed March 2023, reported by Kévin Mosbahi (Mika).
Vulnerability Overview
The CBX Currency Converter plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.0.3. This is due to missing or incorrect nonce validation on the 'get_settings_fields' function. This makes it possible for unauthenticated attackers to view and potentially change plugin settings via a 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)
CBX Currency Converter <= 3.0.3 carries this weakness at get_settings_fields, and reaching it 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 CBX Currency Converter the fix is 3.0.4: builds <= 3.0.3 are affected, anything from 3.0.4 onward is not.
Remediation
Update to version 3.0.4, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to CBX Currency Converter: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: CBX Currency Converter 3.0.4 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
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