CVE-2023-2066

Announcement & Notification Banner – Bulletin <= 3.6.0 - Missing Authorization Checks

2023-05-11 00:00
Chloe Chamberland

Strategic Overview

Status
Patched in 3.7.0
Affected Plugin
Announcement & Notification Banner – Bulletin
Affected Version
<= 3.6.0
CVSS
6.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2023-2066
View all Announcement & Notification Banner – Bulletin vulnerabilities

At a glance

CVE-2023-2066 is a medium-severity Missing Authorization vulnerability in the Announcement & Notification Banner WordPress plugin, affecting versions <= 3.6.0. It carries a CVSS score of 6.3 (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 3.7.0; sites on affected versions should update now. Disclosed May 2023, reported by Chloe Chamberland.

Vulnerability Overview

The Announcement & Notification Banner – Bulletin plugin for WordPress is vulnerable to unauthorized access and modification of data due to a missing capability check on the 'bulletinwp_update_bulletin_status', 'bulletinwp_update_bulletin', 'bulletinwp_update_settings', 'bulletinwp_update_status', 'bulletinwp_export_bulletins', and 'bulletinwp_import_bulletins' functions functions in versions up to, and including, 3.6.0. This makes it possible for authenticated attackers with subscriber-level access, and above, to modify the plugin's settings, modify bulletins, create new bulletins, and more.

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

Announcement & Notification Banner <= 3.6.0 carries this weakness at bulletinwp_update_bulletin_status, and reaching it 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 Announcement & Notification Banner the fix is 3.7.0: builds <= 3.6.0 are affected, anything from 3.7.0 onward is not.

Remediation

Update to version 3.7.0, 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: Announcement & Notification Banner 3.7.0 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-2066https://www.wordfence.com/threat-intel/vulnerabilities/id/d242a466-0611-4e64-8145-29f64100e62bhttps://nvd.nist.gov/vuln/detail/CVE-2023-2066

Related records

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