CVE-2019-13569

Email Subscribers & Newsletters <= 4.1.7 - SQL Injection

2019-07-22 00:00

Strategic Overview

Status: Patched in 4.1.8
Affected Plugin: Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress
Affected Version: <= 4.1.7
CVSS: 9.8Critical
Weakness type: CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE: CVE-2019-13569

View all Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress vulnerabilities

At a glance

CVE-2019-13569 is a critical-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Email Subscribers & Newsletters WordPress plugin, affecting versions <= 4.1.7. 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 4.1.8; sites on affected versions should update now. Disclosed July 2019, reported by Tin Duong.

Vulnerability Overview

A SQL injection vulnerability exists in the Icegram Email Subscribers & Newsletters plugin through 4.1.7 for WordPress. Successful exploitation of this vulnerability would allow a remote attacker to execute arbitrary SQL commands on the affected system.

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

Reaching this weakness in Email Subscribers & Newsletters <= 4.1.7 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 Email Subscribers & Newsletters the fix is 4.1.8: builds <= 4.1.7 are affected, anything from 4.1.8 onward is not.

Remediation

Update to version 4.1.8, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Email Subscribers & Newsletters: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Email Subscribers & Newsletters 4.1.8 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2019-13569 https://www.wordfence.com/threat-intel/vulnerabilities/id/5e999e0f-463c-4676-ad18-f4b467bc4bfc https://nvd.nist.gov/vuln/detail/CVE-2019-13569

Related records

Same weakness class

Other vulnerabilities in Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress

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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