Easy Contact Form Pro < 1.1.1.9 - Authenticated Stored Cross-Site Scripting
Strategic Overview
- Status
- Patched in 1.1.1.9
- Affected Plugin
- Easy Contact Form Pro
- Affected Version
< 1.1.1.9- CVSS
- 5.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-24168
At a glance
CVE-2021-24168 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Easy Contact Form Pro WordPress plugin, affecting versions < 1.1.1.9. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 1.1.1.9; sites on affected versions should update now. Disclosed January 2021, reported by Rahul Ramakant Singh.
Vulnerability Overview
The Easy Contact Form Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting did not properly sanitise the text fields (such as Email Subject, Email Recipient, etc) when creating or editing a form in versions before 1.1.1.9. This makes it possible for Author-level attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in Easy Contact Form Pro < 1.1.1.9 takes any authenticated account. 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 Easy Contact Form Pro the fix is 1.1.1.9: builds < 1.1.1.9 are affected, anything from 1.1.1.9 onward is not.
Remediation
Update to version 1.1.1.9, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Easy Contact Form Pro: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Easy Contact Form Pro 1.1.1.9 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
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