CVE-2020-7948

Login by Auth0 <= 3.11.3 - Insecure Direct Object Reference

2020-04-01 00:00

Strategic Overview

Status: Patched in 4.0.0
Affected Plugin: Login by Auth0
Affected Version: <= 3.11.3
CVSS: 4.3Medium
Weakness type: CWE-639 · Authorization Bypass Through User-Controlled Key
CVE: CVE-2020-7948

At a glance

CVE-2020-7948 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Login by Auth0 WordPress plugin, affecting versions <= 3.11.3. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The issue is fixed in version 4.0.0; sites on affected versions should update now. Disclosed April 2020, reported by Muhamad Visat.

Vulnerability Overview

An issue was discovered in the Login by Auth0 plugin before 4.0.0 for WordPress. A user can perform an insecure direct object reference.

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-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Login by Auth0 <= 3.11.3 takes a caller who can reach the endpoint. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Login by Auth0 the fix is 4.0.0: builds <= 3.11.3 are affected, anything from 4.0.0 onward is not.

Remediation

Update to version 4.0.0, 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: Login by Auth0 4.0.0 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-7948 https://www.wordfence.com/threat-intel/vulnerabilities/id/155e43f2-d46f-413f-bedd-7ab8905c1c35 https://nvd.nist.gov/vuln/detail/CVE-2020-7948

Related records

Other vulnerabilities in Login by Auth0

CVSS Vector

4.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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