CVE-2026-2666 mingSoft MCMS Template Archive uploadTemplate.do unrestricted upload
Remote attackers can upload arbitrary files via the template archive handler, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2666?
CVE-2026-2666 is a medium-severity vulnerability in mingSoft MCMS, published on 18 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A flaw has been found in mingSoft MCMS 6.1.1. The affected element is an unknown function of the file /ms/file/uploadTemplate.do of the component Template Archive Handler. Executing a manipulation of the argument File can lead to unrestricted upload. The attack can be launched remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2026-2666?
2 open source packages ship an affected version, including net.mingsoft:ms-mcms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
net.mingsoft:ms-mcms Maven | All versions to 6.1.1 | None |
net.mingsoft:ms-mcms Maven | All versions to 6.1.1 | None |
Products include Mingsoft Mcms.
How do I fix CVE-2026-2666?
No fix has been published for CVE-2026-2666 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-2666 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2666 exists.
Other vulnerabilities in mingSoft MCMS
- CVE-2025-56316 MCMS vulnerable SQL injection via the content_title parameter
- CVE-2025-29287 MCMS allows arbitrary file uploads in the ueditor component
- CVE-2023-50578 Mingsoft MCMS SQL injection
- CVE-2020-20913 Ming-Soft MCMS vulnerable to SQL injection
- CVE-2022-36272 Mingsoft MCMS SQL injection vulnerability in /mdiy/page/verify URI via fieldName parameter
Sources
Also known as GHSA-r9wp-qq53-qvjx.