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.

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

EPSS: 0.007 (48.1th percentile) — read the EPSS interpretation.

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.

Affected products

Amastar Technology Meetinghub — versions 0
Hamastar Meetinghub_paperless_meetings

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

twcert@cert.org.tw (Third Party Advisory, third-party-advisory)
twcert@cert.org.tw (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.