mingSoft MCMS Template Archive uploadTemplate.do unrestricted upload

published 2026-02-18 8 mo ago modified 2026-06-17 4 mo ago also GHSA-r9wp-qq53-qvjx , EUVD-2026-7637

cvss: 4.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

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.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 8 mo ago (2026-02-18)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/chujianxin0101/vuln/issues/11#issue-3905144613 referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/chujianxin0101/vuln/issues/11 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	4.7	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	2.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P
GitHub	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
maven	net.mingsoft:ms-mcms	<=6.1.1	no fix listed

Affected products

mingSoft MCMS

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-284 Improper Access Control

References

github.com /chujianxin0101/vuln/issues/11#issue-3905144613
exploit, issue-tracking
github.com /chujianxin0101/vuln/issues/11
issue-tracking, web, exploit
vuldb.com /?id.346463
vdb-entry, technical-description, web, third-party-advisory
vuldb.com /?ctiid.346463
signature, permissions-required, web, vdb-entry
vuldb.com /?submit.753243
third-party-advisory, web, vdb-entry
nvd.nist.gov /vuln/detail/CVE-2026-2666
advisory
github.com /ming-soft/MCMS
package

Sources

CVE List CVE-2026-2666
GitHub Advisory GHSA-r9wp-qq53-qvjx
NVD CVE-2026-2666

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary