CVE-2019-13571

Advanced Contact Form 7 DB <= 1.6.2 - SQL Injection

2020-09-22 00:00
Tin Duong

Strategic Overview

Status
Patched in 1.7.0
Affected Plugin
Advanced Contact form 7 DB
Affected Version
<= 1.6.2
CVSS
9.8Critical
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2019-13571
View all Advanced Contact form 7 DB vulnerabilities

At a glance

CVE-2019-13571 is a critical-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Advanced Contact form 7 DB WordPress plugin, affecting versions <= 1.6.2. 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 1.7.0; sites on affected versions should update now. Disclosed September 2020, reported by Tin Duong.

Vulnerability Overview

A SQL injection vulnerability exists in the Vsourz Digital Advanced CF7 DB plugin through 1.6.1 for WordPress. Successful exploitation of this vulnerability would allow a remote attacker to execute arbitrary SQL commands on the affected system. 1.7.0 contained an additional security patch.

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 Advanced Contact form 7 DB <= 1.6.2 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 Advanced Contact form 7 DB the fix is 1.7.0: builds <= 1.6.2 are affected, anything from 1.7.0 onward is not.

Remediation

Update to version 1.7.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Advanced Contact form 7 DB: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Advanced Contact form 7 DB 1.7.0 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2019-13571https://www.wordfence.com/threat-intel/vulnerabilities/id/14d48a81-c6b5-415f-8c82-5fd40b2e790ahttps://nvd.nist.gov/vuln/detail/CVE-2019-13571

Related records

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