Arbitrary File Upload Vulnerability in Flex QR Code Generator Plugin for WordPress
CVE-2025-12673

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Flex Qr Code Generator
Vendor
CVE Published:
6 December 2025

What is CVE-2025-12673?

The Flex QR Code Generator plugin for WordPress has a serious vulnerability that allows unauthenticated attackers to upload arbitrary files due to inadequate file type validation in the update_qr_code() function. This flaw affects all versions up to and including 1.2.6, potentially enabling remote code execution on the affected site's server.

Affected Version(s)

Flex QR Code Generator * <= 1.2.6

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/flex-qr-code-g...
https://ryankozak.com/posts/cve-2025-12673/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ryan Kozak
JSON
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CVE-2025-12673 : Arbitrary File Upload Vulnerability in Flex QR Code Generator Plugin for WordPress