CVE-2024-4186

Edwiser Bridge <= 3.0.5 - Authentication Bypass due to Missing Empty Value Check

2024-05-06 00:00
István Márton

Strategic Overview

Status
Patched in 3.0.6
Affected Plugin
Edwiser Bridge – WordPress Moodle Integration
Affected Version
<= 3.0.5
CVSS
9.8Critical
Weakness type
CWE-288 · Authentication Bypass Using an Alternate Path or Channel
CVE
CVE-2024-4186
View all Edwiser Bridge – WordPress Moodle Integration vulnerabilities

At a glance

CVE-2024-4186 is a critical-severity Authentication Bypass Using an Alternate Path or Channel vulnerability in the Edwiser Bridge WordPress plugin, affecting versions <= 3.0.5. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 3.0.6; sites on affected versions should update now. Disclosed May 2024, reported by István Márton.

Vulnerability Overview

The Edwiser Bridge plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 3.0.5. This is due to the 'eb_user_email_verification_key' default value is empty, and the not empty check is missing in the 'eb_user_email_verify' function. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the user id. This can only be exploited if the 'Email Verification' setting is enabled.

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, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-288: Authentication Bypass Using an Alternate Path or Channel

Edwiser Bridge <= 3.0.5 carries this weakness at eb_user_email_verification_key, and reaching it takes a caller who can reach the endpoint. Authentication bypass through an alternate path means the application has a second route to a protected action that skips the checks the primary route performs.

The protection on the main path becomes irrelevant, because the attacker simply uses the route that never asks. For Edwiser Bridge the fix is 3.0.6: builds <= 3.0.5 are affected, anything from 3.0.6 onward is not.

Remediation

Update to version 3.0.6, 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: Edwiser Bridge 3.0.6 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-4186https://www.wordfence.com/threat-intel/vulnerabilities/id/6969d281-f280-4714-9859-38ac66e9cc60https://nvd.nist.gov/vuln/detail/CVE-2024-4186

Related records

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