Arbitrary file upload in Amastar Technology Meetinghub
CVE-2026-1331
MeetingHub developed by HAMASTAR Technology has an Arbitrary File Upload vulnerability, allowing unauthenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (53.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001
Affected products
Weakness classification (CWE)
References
- www.twcert.org.tw/tw/cp-132-10650-a5ee9-1.html (Third Party Advisory, third-party-advisory)
- www.twcert.org.tw/en/cp-139-10651-ff09c-2.html (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-1331?
- CVE-2026-1331 is a critical-severity vulnerability in Amastar Technology Meetinghub, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-01-22.
- How severe is CVE-2026-1331?
- Critical severity. CVSS v3 base score is 9.8 out of 10.