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Description

The Flex QR Code Generator plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the update_qr_code() function in all versions up to, and including, 1.2.6. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

PUBLISHED Reserved 2025-11-03 | Published 2025-12-06 | Updated 2025-12-06 | Assigner Wordfence




CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-434 Unrestricted Upload of File with Dangerous Type

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-10-26:Discovered
2025-12-05:Disclosed

Credits

Ryan Kozak finder

References

www.wordfence.com/...-0db8-485b-a626-5e0df2076c05?source=cve

plugins.trac.wordpress.org/...or/trunk/qr-code-generator.php

ryankozak.com/posts/cve-2025-12673/

github.com/d0n601/CVE-2025-12673

cve.org (CVE-2025-12673)

nvd.nist.gov (CVE-2025-12673)