CVE-2022-0591

Formcraft3 <= 3.8.27 - Server Side Request Forgery

2022-02-28 00:00

Strategic Overview

Status: Patched in 3.8.28
Affected Plugin: FormCraft – Form Builder
Affected Version: < 3.8.28
CVSS: 9.1Critical
Weakness type: CWE-918 · Server-Side Request Forgery (SSRF)
CVE: CVE-2022-0591

View all FormCraft – Form Builder vulnerabilities

At a glance

CVE-2022-0591 is a critical-severity Server-Side Request Forgery (SSRF) vulnerability in the FormCraft WordPress plugin, affecting versions < 3.8.28. It carries a CVSS score of 9.1 (reachable over the network; low attack complexity; high confidentiality, integrity impact). Exploitation requires no authentication. The issue is fixed in version 3.8.28; sites on affected versions should update now. Disclosed February 2022, reported by Brandon James Roldan (tomorrowisnew).

Vulnerability Overview

The FormCraft WordPress plugin before 3.8.28 does not validate the URL parameter in the formcraft3_get AJAX action, leading to SSRF issues exploitable by unauthenticated users

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. A successful exploit has high impact on confidentiality, integrity.

CWE-918: Server-Side Request Forgery (SSRF)

Reaching this weakness in FormCraft < 3.8.28 takes a caller who can reach the endpoint. Server-side request forgery means the application fetches a URL supplied by the caller, turning the server into a proxy for requests the attacker could not make directly.

The request originates from inside the hosting network, which is how these flaws reach cloud metadata endpoints, internal admin panels and services that trust local traffic. For FormCraft the fix is 3.8.28: builds < 3.8.28 are affected, anything from 3.8.28 onward is not.

Remediation

Update to version 3.8.28, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to FormCraft: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: FormCraft 3.8.28 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-0591 https://www.wordfence.com/threat-intel/vulnerabilities/id/d5d23a02-11b6-4674-a13a-884de2d51ed7 https://nvd.nist.gov/vuln/detail/CVE-2022-0591

Related records

Other vulnerabilities in FormCraft – Form Builder

CVSS Vector

9.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone

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