CVE-2023-2067

Announcement & Notification Banner – Bulletin <= 3.7.0 - Cross-Site Request Forgery

2023-05-11 00:00

Strategic Overview

Status: Patched in 3.7.1
Affected Plugin: Announcement & Notification Banner – Bulletin
Affected Version: <= 3.7.0
CVSS: 6.3Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2023-2067

View all Announcement & Notification Banner – Bulletin vulnerabilities

At a glance

CVE-2023-2067 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Announcement & Notification Banner WordPress plugin, affecting versions <= 3.7.0. It carries a CVSS score of 6.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.7.1; 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 Cross-Site Request Forgery due to a missing nonce validation on the 'bulletinwp_update_bulletin_status', 'bulletinwp_update_bulletin', 'bulletinwp_update_settings', 'bulletinwp_update_status', 'bulletinwp_export_bulletins', and 'bulletinwp_import_bulletins' functions in versions up to, and including, 3.7.0. This makes it possible for unauthenticated attackers to modify the plugin's settings, modify bulletins, create new bulletins, and more, via a forged request granted they can trick a site's user 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)

Announcement & Notification Banner <= 3.7.0 carries this weakness at bulletinwp_update_bulletin_status, and reaching it 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 Announcement & Notification Banner the fix is 3.7.1: builds <= 3.7.0 are affected, anything from 3.7.1 onward is not.

Remediation

Update to version 3.7.1, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Announcement & Notification Banner: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Announcement & Notification Banner 3.7.1 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-2067 https://www.wordfence.com/threat-intel/vulnerabilities/id/b808450f-0ebf-4c49-a9e3-f1c1f2b1f632 https://nvd.nist.gov/vuln/detail/CVE-2023-2067

Related records

Other vulnerabilities in Announcement & Notification Banner – Bulletin

CVSS Vector

6.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow

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