CVE-2016-4828

Welcart e-Commerce <= 1.8.2 - Authentication Bypass

2016-06-24 00:00

Strategic Overview

Status: Patched in 1.8.3
Affected Plugin: Welcart e-Commerce
Affected Version: <= 1.8.2
CVSS: 9.8Critical
Weakness type: CWE-288 · Authentication Bypass Using an Alternate Path or Channel
CVE: CVE-2016-4828

View all Welcart e-Commerce vulnerabilities

At a glance

CVE-2016-4828 is a critical-severity Authentication Bypass Using an Alternate Path or Channel vulnerability in the Welcart e-Commerce WordPress plugin, affecting versions <= 1.8.2. 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 1.8.3; sites on affected versions should update now. Disclosed June 2016, reported by Gen Sato.

Vulnerability Overview

The Collne Welcart e-Commerce plugin before 1.8.3 for WordPress mishandles sessions, which allows remote attackers to obtain access by leveraging knowledge of the e-mail address associated with an account.

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

Reaching this weakness in Welcart e-Commerce <= 1.8.2 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 Welcart e-Commerce the fix is 1.8.3: builds <= 1.8.2 are affected, anything from 1.8.3 onward is not.

Remediation

Update to version 1.8.3, 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: Welcart e-Commerce 1.8.3 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2016-4828 https://www.wordfence.com/threat-intel/vulnerabilities/id/2f8f6ade-84a2-4a42-9208-a74f5ebe19b3 https://nvd.nist.gov/vuln/detail/CVE-2016-4828

Related records

Other vulnerabilities in Welcart e-Commerce

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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