CVE-2020-7228

Calculated Fields Form <= 1.0.353 - Authenticated Stored Cross-Site Scripting

2020-01-22 00:00
Ben Armstrong

Strategic Overview

Status
Patched in 1.0.354
Affected Plugin
Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More
Affected Version
<= 1.0.353
CVSS
5.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2020-7228
View all Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More vulnerabilities

At a glance

CVE-2020-7228 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Calculated Fields Form WordPress plugin, affecting versions <= 1.0.353. 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 1.0.354; sites on affected versions should update now. Disclosed January 2020, reported by Ben Armstrong.

Vulnerability Overview

The Calculated Fields Form plugin through 1.0.353 for WordPress suffers from multiple Stored XSS vulnerabilities present in the input forms. These can be exploited by an authenticated user.

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 Calculated Fields Form <= 1.0.353 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 Calculated Fields Form the fix is 1.0.354: builds <= 1.0.353 are affected, anything from 1.0.354 onward is not.

Remediation

Update to version 1.0.354, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Calculated Fields Form: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Calculated Fields Form 1.0.354 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-7228https://www.wordfence.com/threat-intel/vulnerabilities/id/334ff8d7-1313-4c19-aed3-0c4625b895abhttps://nvd.nist.gov/vuln/detail/CVE-2020-7228

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C