WP-FormAssembly <= 2.0.8 - Limited Server Side Request Forgery via 'formassembly' shortcode

2023-05-02 00:00
Anonymous

Strategic Overview

Status
Patched in 2.0.9
Affected Plugin
WP-FormAssembly
Affected Version
< 2.0.9
CVSS
5.0Medium
Weakness type
CWE-918 · Server-Side Request Forgery (SSRF)
CVE
CVE pending
View all WP-FormAssembly vulnerabilities

At a glance

This record tracks a medium-severity Server-Side Request Forgery (SSRF) vulnerability in the WP-FormAssembly WordPress plugin, affecting versions < 2.0.9. It carries a CVSS score of 5.0 (reachable over the network; low attack complexity). The issue is fixed in version 2.0.9; sites on affected versions should update now. Disclosed May 2023.

Vulnerability Overview

The WP-FormAssembly plugin for WordPress is vulnerable to Server-Side Request Forgery in versions up to, and including, 2.0.8 via the 'formassembly' shortcode. This can allow authenticated attackers with subscriber-level privileges or above to make web requests to arbitrary locations that include '/rest' in the path, originating from the web application, and can be used to query and modify information from internal services.

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 interaction from a victim user.

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

WP-FormAssembly < 2.0.9 carries this weakness at formassembly, and reaching it 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 WP-FormAssembly the fix is 2.0.9: builds < 2.0.9 are affected, anything from 2.0.9 onward is not.

Remediation

Update to version 2.0.9, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WP-FormAssembly: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WP-FormAssembly 2.0.9 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/288853b8-7523-472e-8406-257ffb3bd5ea

Related records

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