WP Simple Booking Calendar <= 2.0.8.4 - Cross-Site Request Forgery
Strategic Overview
- Status
- Patched in 2.0.8.5
- Affected Plugin
- WP Simple Booking Calendar
- Affected Version
<= 2.0.8.4- CVSS
- 4.3Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2023-51525
At a glance
CVE-2023-51525 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the WP Simple Booking Calendar WordPress plugin, affecting versions <= 2.0.8.4. 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 2.0.8.5; sites on affected versions should update now. Disclosed December 2023, reported by Brandon James Roldan (tomorrowisnew).
Vulnerability Overview
The WP Simple Booking Calendar plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.0.8.4. This is due to missing or incorrect nonce validation on the wpsbc_refresh_calendar_editor function. This makes it possible for unauthenticated attackers to refresh the calendar editor 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)
Reaching this weakness in WP Simple Booking Calendar <= 2.0.8.4 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 WP Simple Booking Calendar the fix is 2.0.8.5: builds <= 2.0.8.4 are affected, anything from 2.0.8.5 onward is not.
Remediation
Update to version 2.0.8.5, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to WP Simple Booking Calendar: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WP Simple Booking Calendar 2.0.8.5 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
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