Strategic Overview
- Status
- Patched in 1.6.1
- Affected Version
<= 1.6.0- CVSS
- 4.3Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2024-33589
At a glance
CVE-2024-33589 is a medium-severity Missing Authorization vulnerability in the KB Support WordPress plugin, affecting versions <= 1.6.0. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 1.6.1; sites on affected versions should update now. Disclosed April 2024, reported by beluga.
Vulnerability Overview
The KB Support plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the kbs_ajax_display_ticket_notes and kbs_ajax_display_ticket_replies function in versions up to, and including, 1.6.0. This makes it possible for authenticated attackers, with subscriber-level access and above, to view ticket notes and replies.
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
Reaching this weakness in KB Support <= 1.6.0 takes a caller who can reach the endpoint. 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 KB Support the fix is 1.6.1: builds <= 1.6.0 are affected, anything from 1.6.1 onward is not.
Remediation
Update to version 1.6.1, 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: KB Support 1.6.1 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
- 8.1CVE-2024-8548: KB Support Authenticated (Subscriber+) Multiple
CVE-2024-8548 - 6.5CVE-2024-8632: KB Support Unauthenticated Ticket Reply Exposure
CVE-2024-8632 - 5.4CVE-2023-37890: KB Support <= 1.5.88 Sensitive Data Exposure
CVE-2023-37890 - 4.3KB Support <= 1.5.88 Authenticated (Subscriber+) User Data Retrieval
Other vulnerabilities in KB Support – Customer Support Ticket & Helpdesk Plugin, Knowledge Base Plugin
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