CVE-2021-24700

Forminator <= 1.15.2 - Admin+ Stored Cross-Site Scripting

2021-10-20 00:00

Strategic Overview

Status: Patched in 1.15.4
Affected Plugin: Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Affected Version: < 1.15.4
CVSS: 4.8Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24700

View all Forminator Forms – Contact Form, Payment Form & Custom Form Builder vulnerabilities

At a glance

CVE-2021-24700 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Forminator Forms WordPress plugin, affecting versions < 1.15.4. It carries a CVSS score of 4.8 (reachable over the network; low attack complexity). The issue is fixed in version 1.15.4; sites on affected versions should update now. Disclosed October 2021, reported by Shivam Rai.

Vulnerability Overview

The Forminator WordPress plugin before 1.15.4 does not sanitize and escape the email field label, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html is disallowed

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 Forminator Forms < 1.15.4 takes a caller who can reach the endpoint. 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 Forminator Forms the fix is 1.15.4: builds < 1.15.4 are affected, anything from 1.15.4 onward is not.

Remediation

Update to version 1.15.4, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Forminator Forms: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Forminator Forms 1.15.4 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24700 https://www.wordfence.com/threat-intel/vulnerabilities/id/9d68ab8b-38c8-47aa-8b69-8cebe0a8d24e https://nvd.nist.gov/vuln/detail/CVE-2021-24700

Related records

Same weakness class

Other vulnerabilities in Forminator Forms – Contact Form, Payment Form & Custom Form Builder

CVSS Vector

4.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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