Cross-Site Scripting Vulnerability in Acmailer by Acmailer Inc.
CVE-2026-66358

5.1MEDIUM

Key Information:

Vendor

Extra Innovation Inc.

Status
Acmailer Cgi
Acmailer Db
Vendor
CVE Published:
19 August 2026

What is CVE-2026-66358?

A cross-site scripting vulnerability has been identified in Acmailer, which could potentially enable attackers to execute arbitrary scripts within the context of an affected user's session. This vulnerability poses significant risk as it can lead to unauthorized actions or data exposure, making it crucial for users to promptly apply recommended security patches and updates.

Affected Version(s)

acmailer CGI 0 < 4.1.2

acmailer DB 0 < 1.2.2

References

https://www.acmailer.jp/info/de.cgi?id=119
https://jvn.jp/en/jp/JVN47716829/

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

CVSS V3.0

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.