PT-2025-49333 · WordPress · Flex Qr Code Generator

Ryan Kozak · Published 2025-12-06 · Updated 2025-12-11 · CVE-2025-12673

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Flex QR Code Generator plugin for WordPress versions up to and including 1.2.6

Description The Flex QR Code Generator plugin for WordPress is susceptible to arbitrary file uploads because of a lack of file type validation. This occurs in the update qr code() function. Unauthenticated attackers can exploit this to upload arbitrary files to the server, potentially leading to remote code execution.

Recommendations Update the Flex QR Code Generator plugin to a version later than 1.2.6.

Exploit

Fix

RCE

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2025-12673

Affected Products

Flex Qr Code Generator

References · 12

• 🔥 https://github.com/d0n601/CVE-2025-12673 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-12673 · Security Note
• https://t.me/CVEtracker/38976 · Telegram Post
• https://ryankozak.com/posts/cve-2025-12673 · Note
• https://t.me/cveNotify/145001 · Telegram Post
• https://plugins.trac.wordpress.org/changeset/3412218 · Note
• https://twitter.com/CVEnew/status/1997189884268658757 · Twitter Post
• https://twitter.com/CveFindCom/status/1997194107643392335 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/3d71404e-0db8-485b-a626-5e0df2076c05?source=cve · Note
• https://twitter.com/cracbot/status/1999071712705659198 · Twitter Post
• https://plugins.trac.wordpress.org/browser/flex-qr-code-generator/trunk/qr-code-generator.php#L457 · Note
• https://twitter.com/MNovofastovsky/status/1999094061874217352 · Twitter Post