CVE-2021-36886

Contact Form 7 Database Addon – CFDB7 plugin <= 1.2.5.9 - Cross-Site Request Forgery

2021-11-12 00:00

Strategic Overview

Status: Patched in 1.2.6.1
Affected Plugin: Database Addon for Contact Form 7 – CFDB7
Affected Version: <= 1.2.5.9
CVSS: 6.5Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2021-36886

View all Database Addon for Contact Form 7 – CFDB7 vulnerabilities

At a glance

CVE-2021-36886 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Database Addon for Contact Form 7 WordPress plugin, affecting versions <= 1.2.5.9. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high integrity impact). Exploitation requires no authentication. The issue is fixed in version 1.2.6.1; sites on affected versions should update now. Disclosed November 2021, reported by R3N0.

Vulnerability Overview

Cross-Site Request Forgery (CSRF) vulnerability discovered in Contact Form 7 Database Addon – CFDB7 WordPress plugin (versions <= 1.2.5.9).

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 integrity.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Database Addon for Contact Form 7 <= 1.2.5.9 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Database Addon for Contact Form 7 the fix is 1.2.6.1: builds <= 1.2.5.9 are affected, anything from 1.2.6.1 onward is not.

Remediation

Update to version 1.2.6.1, 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 1.2.6.1 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-36886 https://www.wordfence.com/threat-intel/vulnerabilities/id/0f2c46f7-b7c9-41a5-8cf9-61a683c3922c https://nvd.nist.gov/vuln/detail/CVE-2021-36886

Related records

Other vulnerabilities in Database Addon for Contact Form 7 – CFDB7

CVSS Vector

6.5

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone

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