CVE-2022-2133

OAuth Single Sign On – SSO (OAuth Client) <= 6.22.5 - Authentication Bypass

2022-06-27 00:00

Strategic Overview

Status: Patched in 6.22.6
Affected Plugin: OAuth Single Sign On – SSO (OAuth Client)
Affected Version: <= 6.22.5
CVSS: 8.1High
Weakness type: CWE-287 · Improper Authentication
CVE: CVE-2022-2133

View all OAuth Single Sign On – SSO (OAuth Client) vulnerabilities

At a glance

CVE-2022-2133 is a high-severity Improper Authentication vulnerability in the OAuth Single Sign On WordPress plugin, affecting versions <= 6.22.5. It carries a CVSS score of 8.1 (reachable over the network; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 6.22.6; sites on affected versions should update now. Disclosed June 2022, reported by István Márton.

Vulnerability Overview

The OAuth Single Sign On WordPress plugin before 6.22.6 doesn't validate that OAuth access token requests are legitimate, which allows attackers to log onto the site with the only knowledge of a user's email address.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, 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-287: Improper Authentication

Reaching this weakness in OAuth Single Sign On <= 6.22.5 takes a caller who can reach the endpoint. Improper authentication means the mechanism that proves who a caller is can be satisfied without the secret it was supposed to require.

An attacker authenticates as another user — administrators included — without ever knowing a password, so password policies and login rate limits never come into play. For OAuth Single Sign On the fix is 6.22.6: builds <= 6.22.5 are affected, anything from 6.22.6 onward is not.

Remediation

Update to version 6.22.6, 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: OAuth Single Sign On 6.22.6 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-2133 https://www.wordfence.com/threat-intel/vulnerabilities/id/fae6e691-0d2a-4784-8ab1-4923d650a703 https://nvd.nist.gov/vuln/detail/CVE-2022-2133

Related records

Same weakness class

8.1CVE-2024-10111: OAuth Single Sign On – SSO Authentication BypassCVE-2024-10111

Other vulnerabilities in OAuth Single Sign On – SSO (OAuth Client)

CVSS Vector

8.1

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

Base

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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