What is CVE-2018-18830?

CVE-2018-18830 is a critical-severity vulnerability in Mingsoft Mcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-10-30.

How severe is CVE-2018-18830?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Mingsoft Mcms

CVE-2018-18830

An issue was discovered in com\mingsoft\basic\action\web\FileAction.java in MCMS 4.6.5. Since the upload interface does not verify the user login status, you can use this interface to upload files without setting a cookie. First, start an upload of JSP code with a .png filename, and then intercept the data packet. In the name parameter, change the suffix to jsp. In the response, the server returns the storage path of the file, which can be accessed to execute arbitrary JSP code.

Vulnerability class: Unrestricted File Upload

EPSS: 0.012 (65.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mingsoft Mcms — versions 4.6.5
N/a — versions n/a

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-18830?: CVE-2018-18830 is a critical-severity vulnerability in Mingsoft Mcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-10-30.
How severe is CVE-2018-18830?: Critical severity. CVSS v3 base score is 9.8 out of 10.