CVE-2020-8772

InfiniteWP Client <= 1.9.4.4 - Authentication Bypass

2020-01-14 00:00

Strategic Overview

Status: Patched in 1.9.4.5
Affected Plugin: InfiniteWP Client
Affected Version: <= 1.9.4.4
CVSS: 9.8Critical
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2020-8772

View all InfiniteWP Client vulnerabilities

At a glance

CVE-2020-8772 is a critical-severity Missing Authorization vulnerability in the InfiniteWP Client WordPress plugin, affecting versions <= 1.9.4.4. 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 1.9.4.5; sites on affected versions should update now. Disclosed January 2020, reported by WebARX Security.

Vulnerability Overview

The InfiniteWP Client plugin before 1.9.4.5 for WordPress has a missing authorization check in iwp_mmb_set_request in init.php. Any attacker who knows the username of an administrator can log in.

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-862: Missing Authorization

Reaching this weakness in InfiniteWP Client <= 1.9.4.4 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For InfiniteWP Client the fix is 1.9.4.5: builds <= 1.9.4.4 are affected, anything from 1.9.4.5 onward is not.

Remediation

Update to version 1.9.4.5, 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: InfiniteWP Client 1.9.4.5 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-8772 https://www.wordfence.com/threat-intel/vulnerabilities/id/63f10214-69ef-4b5d-8d2b-2e2c1bafa7e7 https://nvd.nist.gov/vuln/detail/CVE-2020-8772

Related records

Other vulnerabilities in InfiniteWP Client

CVSS Vector

9.8

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

Base

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

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