CVE-2019-10673

Ultimate Member <= 2.0.39 - Cross-Site Request Forgery

2019-04-01 00:00

Strategic Overview

Status: Patched in 2.0.40
Affected Plugin: Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Affected Version: < 2.0.40
CVSS: 8.8High
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2019-10673

View all Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin vulnerabilities

At a glance

CVE-2019-10673 is a high-severity Cross-Site Request Forgery (CSRF) vulnerability in the Ultimate Member WordPress plugin, affecting versions < 2.0.40. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 2.0.40; sites on affected versions should update now. Disclosed April 2019, reported by Georg Knabl.

Vulnerability Overview

A CSRF vulnerability in a logged-in user's profile edit form in the Ultimate Member plugin before 2.0.40 for WordPress allows attackers to become admin and subsequently extract sensitive information and execute arbitrary code. This occurs because the attacker can change the e-mail address in the administrator profile, and then the attacker is able to reset the administrator password using the WordPress "password forget" form.

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. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Ultimate Member < 2.0.40 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 Ultimate Member the fix is 2.0.40: builds < 2.0.40 are affected, anything from 2.0.40 onward is not.

Remediation

Update to version 2.0.40, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Ultimate Member: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Ultimate Member 2.0.40 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2019-10673 https://www.wordfence.com/threat-intel/vulnerabilities/id/fa0881ab-d731-4e57-8323-c49b9306bf50 https://nvd.nist.gov/vuln/detail/CVE-2019-10673

Related records

Same weakness class

Other vulnerabilities in Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin

CVSS Vector

8.8

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

Base

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

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