CVE-2021-24835

WCFM - Frontend Manager for WooCommerce <= 6.5.11 - Customer/Subscriber+ SQL Injection

2021-10-11 00:00

Strategic Overview

Status: Patched in 6.5.12
Affected Plugin: WCFM – Frontend Manager for WooCommerce
Affected Version: <= 6.5.11
CVSS: 8.8High
Weakness type: CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE: CVE-2021-24835

View all WCFM – Frontend Manager for WooCommerce vulnerabilities

At a glance

CVE-2021-24835 is a high-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the WCFM WordPress plugin, affecting versions <= 6.5.11. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). The issue is fixed in version 6.5.12; sites on affected versions should update now. Disclosed October 2021, reported by ZhongFu Su.

Vulnerability Overview

The WCFM – Frontend Manager for WooCommerce along with Bookings Subscription Listings Compatible WordPress plugin before 6.5.12, when used in combination with another WCFM - WooCommerce Multivendor plugin such as WCFM - WooCommerce Multivendor Marketplace, does not escape the withdrawal_vendor parameter before using it in a SQL statement, allowing low privilege users such as Subscribers to perform SQL injection attacks

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

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Reaching this weakness in WCFM <= 6.5.11 takes a caller who can reach the endpoint. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For WCFM the fix is 6.5.12: builds <= 6.5.11 are affected, anything from 6.5.12 onward is not.

Remediation

Update to version 6.5.12, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WCFM: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WCFM 6.5.12 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24835 https://www.wordfence.com/threat-intel/vulnerabilities/id/6eb23014-7bc6-4505-85d7-91d29bb2d8fb https://nvd.nist.gov/vuln/detail/CVE-2021-24835

Related records

Other vulnerabilities in WCFM – Frontend Manager for WooCommerce

CVSS Vector

8.8

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

Base

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

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