RW Elephant Rental Inventory <= 2.3.13 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Modification via 'toggle_cache' AJAX Action
Strategic Overview
- Status
- Patched in 2.4.0
- Affected Plugin
- RW Elephant Rental Inventory
- Affected Version
<= 2.3.13- CVSS
- 4.3Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2026-4123
At a glance
CVE-2026-4123 is a medium-severity Missing Authorization vulnerability in the RW Elephant Rental Inventory WordPress plugin, affecting versions <= 2.3.13. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 2.4.0; sites on affected versions should update now. Disclosed September 2026, reported by Nabil Irawan.
Vulnerability Overview
The RW Elephant Rental Inventory plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 2.3.13. This is due to a missing capability check on the toggle_cache() function which is hooked to the wp_ajax_toggle_cache AJAX action. The function also lacks nonce verification. This makes it possible for authenticated attackers, with Subscriber-level access and above, to toggle the plugin's cache setting on or off by sending a POST request to admin-ajax.
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 interaction from a victim user.
CWE-862: Missing Authorization
RW Elephant Rental Inventory <= 2.3.13 carries this weakness at toggle_cache(), and reaching it takes an account at Subscriber level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For RW Elephant Rental Inventory the fix is 2.4.0: builds <= 2.3.13 are affected, anything from 2.4.0 onward is not.
Remediation
Update to version 2.4.0, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: RW Elephant Rental Inventory 2.4.0 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
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