CVE-2021-24144

Contact Form 7 Database Addon <= 1.2.5.4 - CSV Injection

2021-01-25 00:00

Strategic Overview

Status: Patched in 1.2.5.6
Affected Plugin: Database Addon for Contact Form 7 – CFDB7
Affected Version: < 1.2.5.6
CVSS: 8.8High
Weakness type: CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CVE: CVE-2021-24144

View all Database Addon for Contact Form 7 – CFDB7 vulnerabilities

At a glance

CVE-2021-24144 is a high-severity Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in the Database Addon for Contact Form 7 WordPress plugin, affecting versions < 1.2.5.6. 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 1.2.5.6; sites on affected versions should update now. Disclosed January 2021, reported by SunCSR-thiennv.

Vulnerability Overview

Unvalidated input in the Contact Form 7 Database Addon plugin, versions before 1.2.5.6, was prone to a vulnerability that lets remote attackers inject arbitrary formulas into CSV files.

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-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Remediation

Update to version 1.2.5.6, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Database Addon for Contact Form 7: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Database Addon for Contact Form 7 1.2.5.6 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24144 https://www.wordfence.com/threat-intel/vulnerabilities/id/83e53dc4-84fe-4835-aaea-b72dfe8f7475 https://nvd.nist.gov/vuln/detail/CVE-2021-24144

Related records

Other vulnerabilities in Database Addon for Contact Form 7 – CFDB7

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

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/