Contact Form 7 Database Addon – CFDB7 <= 1.2.6.1 - Unauthenticated Stored Cross-Site Scripting
Strategic Overview
- Status
- Patched in 1.2.6.2
- Affected Plugin
- Database Addon for Contact Form 7 – CFDB7
- Affected Version
<= 1.2.6.1- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-36885
At a glance
CVE-2021-36885 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Database Addon for Contact Form 7 WordPress plugin, affecting versions <= 1.2.6.1. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.2.6.2; sites on affected versions should update now. Disclosed November 2021, reported by R3N0.
Vulnerability Overview
Unauthenticated Stored Cross-Site Scripting (XSS) vulnerability discovered in Contact Form 7 Database Addon – CFDB7 WordPress plugin (versions <= 1.2.6.1).
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.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in Database Addon for Contact Form 7 <= 1.2.6.1 takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Database Addon for Contact Form 7 the fix is 1.2.6.2: builds <= 1.2.6.1 are affected, anything from 1.2.6.2 onward is not.
Remediation
Update to version 1.2.6.2, or a newer patched version
How does WordSec protect against this?
Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: 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 1.2.6.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Database Addon for Contact Form 7 – CFDB7
- 8.8CVE-2021-24144: Contact Form 7 Database Addon <= 1.2.5.4 CSV Injection
CVE-2021-24144 - 8.8Contact Form 7 Database Addon <= 1.2.5.3 SQL Injection
- 7.2CVE-2022-3634: Contact Form 7 Database Addon <= 1.2.6.3 CSV Injection
CVE-2022-3634 - 6.5CVE-2021-36886: Contact Form 7 Database Addon – CFDB7 plugin CSRF
CVE-2021-36886 - 5.3CVE-2024-3870: Contact Form 7 Database Addon – CFDB7 Info Exposure
CVE-2024-3870
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