CVE-2021-38346

Published on: 10/14/2021 12:00:00 AM UTC

Last Modified on: 10/18/2021 07:20:00 PM UTC

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

Certain versions of Brizy-page Builder from Brizy contain the following vulnerability:

The Brizy Page Builder plugin <= 2.3.11 for WordPress allowed authenticated users to upload executable files to a location of their choice using the brizy_create_block_screenshot AJAX action. The file would be named using the id parameter, which could be prepended with "../" to perform directory traversal, and the file contents were populated via the ibsf parameter, which would be base64-decoded and written to the file. While the plugin added a .jpg extension to all uploaded filenames, a double extension attack was still possible, e.g. a file named shell.php would be saved as shell.php.jpg, and would be executable on a number of common configurations.

  • CVE-2021-38346 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as HIGH severity.
  • Affected Vendor/Software: URL Logo Brizy.io - Brizy - Page Builder version <= 2.3.11

CVSS3 Score: 8.8 - HIGH

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW LOW NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED HIGH HIGH HIGH

CVSS2 Score: 6.5 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK LOW SINGLE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL PARTIAL PARTIAL

CVE References

Description Tags Link
Multiple Vulnerabilities in Brizy Page Builder Plugin Allow Site Takeover www.wordfence.com
text/html
URL Logo MISC www.wordfence.com/blog/2021/10/multiple-vulnerabilities-in-brizy-page-builder-plugin-allow-site-takeover/

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationBrizyBrizy-page BuilderAllAllAllAll
  • cpe:2.3:a:brizy:brizy-page_builder:*:*:*:*:wordpress:*:*:*:

Discovery Credit

Ramuel Gall, Wordfence

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-38346 : The Brizy Page Builder plugin <= 2.3.11 for WordPress allowed authenticated users to upload execut… twitter.com/i/web/status/1… 2021-10-14 16:06:05
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