CVE-2023-6830

Formidable Forms <= 6.7 - HTML Injection

2024-01-08 00:00

Strategic Overview

Status: Patched in 6.7.1
Affected Plugin: Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More
Affected Version: <= 6.7
CVSS: 6.5Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2023-6830

View all Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More vulnerabilities

At a glance

CVE-2023-6830 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Formidable Forms WordPress plugin, affecting versions <= 6.7. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 6.7.1; sites on affected versions should update now. Disclosed January 2024, reported by drop.

Vulnerability Overview

The Formidable Forms plugin for WordPress is vulnerable to HTML injection in versions up to, and including, 6.7. This vulnerability allows unauthenticated users to inject arbitrary HTML code into form fields. When the form data is viewed by an administrator in the Entries View Page, the injected HTML code is rendered, potentially leading to admin area defacement or redirection to malicious websites. CVE-2024-23522 appears to be a duplicate of this issue.

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, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Formidable Forms <= 6.7 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 Formidable Forms the fix is 6.7.1: builds <= 6.7 are affected, anything from 6.7.1 onward is not.

Remediation

Update to version 6.7.1, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Formidable Forms: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Formidable Forms 6.7.1 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-6830 https://www.wordfence.com/threat-intel/vulnerabilities/id/ff294b0f-97fe-4d27-bf93-f5bbb57ac1f6 https://nvd.nist.gov/vuln/detail/CVE-2023-6830

Related records

Same weakness class

Other vulnerabilities in Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More

CVSS Vector

6.5

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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