CVE-2023-27397

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-23 · updated 2026-06-17
Weakness: CWE-434

Description

Unrestricted upload of file with dangerous type exists in MicroEngine Mailform version 1.1.0 to 1.1.8. If the product's file upload function and server save option are enabled, a remote attacker may save an arbitrary file on the server and execute it.

Affected products

MicroEngine Inc. MicroEngine Mailform: from 1.1.0 before 1.1.9 — fixed in 1.1.9

How to fix

Upgrade to a fixed version: MicroEngine Inc. MicroEngine Mailform 1.1.9. Check the vendor advisory for mitigations.

References

https://jvn.jp/en/jp/JVN31701509/
https://microengine.jp/information/security_2023_05.html
https://jvn.jp/en/jp/JVN31701509/
https://microengine.jp/information/security_2023_05.html

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