Buy Me a Coffee – Button and Widget Plugin <= 3.7 - Cross-Site Request Forgery
Strategic Overview
- Status
- Patched in 3.8
- Affected Plugin
- Buy Me a Coffee – Button and Widget Plugin
- Affected Version
<= 3.7- CVSS
- 7.1High
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2023-2079
At a glance
CVE-2023-2079 is a high-severity Cross-Site Request Forgery (CSRF) vulnerability in the Buy Me a Coffee WordPress plugin, affecting versions <= 3.7. It carries a CVSS score of 7.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.8; sites on affected versions should update now. Disclosed July 2023, reported by István Márton.
Vulnerability Overview
The "Buy Me a Coffee – Button and Widget Plugin" plugin for WordPress is vulnerable to Cross-Site Request Forgery due to missing nonce validation on the recieve_post, bmc_disconnect, name_post, and widget_post functions in versions up to, and including, 3.7. This makes it possible for unauthenticated attackers to update the plugins settings, via a forged request granted the attacker can trick a site's 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 Buy Me a Coffee <= 3.7 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 Buy Me a Coffee the fix is 3.8: builds <= 3.7 are affected, anything from 3.8 onward is not.
Remediation
Update to version 3.8, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Buy Me a Coffee: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Buy Me a Coffee 3.8 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in Buy Me a Coffee – Button and Widget Plugin
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