CVE-2023-4920

BEAR <= 1.1.3.3 - Cross-Site Request Forgery to Stored Cross-Site Scripting

2023-09-25 00:00

Strategic Overview

Status: Patched in 1.1.4
Affected Plugin: BEAR – Bulk Editor for WooCommerce Professional. AI assistant on board (MCP Server)
Affected Version: <= 1.1.3.3
CVSS: 4.3Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2023-4920

View all BEAR – Bulk Editor for WooCommerce Professional. AI assistant on board (MCP Server) vulnerabilities

At a glance

CVE-2023-4920 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the BEAR WordPress plugin, affecting versions <= 1.1.3.3. 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 1.1.4; sites on affected versions should update now. Disclosed September 2023, reported by Marco Wotschka.

Vulnerability Overview

The BEAR for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.1.3.3. This is due to missing or incorrect nonce validation on the woobe_save_options function. This makes it possible for unauthenticated attackers to modify the plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. Additionally, input sanitization and escaping is insufficient resulting in the possibility of malicious script injection.

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 BEAR <= 1.1.3.3 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 BEAR the fix is 1.1.4: builds <= 1.1.3.3 are affected, anything from 1.1.4 onward is not.

Remediation

Update to version 1.1.4, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to BEAR: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: BEAR 1.1.4 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-4920 https://www.wordfence.com/threat-intel/vulnerabilities/id/58d25eeb-b12c-4850-8308-eaa30982b5a8 https://nvd.nist.gov/vuln/detail/CVE-2023-4920

Related records

Same weakness class

Other vulnerabilities in BEAR – Bulk Editor for WooCommerce Professional. AI assistant on board (MCP Server)

CVSS Vector

4.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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