CVE-2026-66358: Cross-site scripting (XSS) in Extra Innovation Inc. acmailer CGI
CVE-2026-66358 is a cross-site scripting (XSS) vulnerability in Extra Innovation Inc.'s acmailer CGI product. This flaw allows an attacker to execute arbitrary scripts in the context of the affected application, potentially leading to limited confidentiality and integrity impacts. The vulnerability affects versions prior to 4.1.2 and 1.2.2. The CVSS v3.0 base score is 6.1, indicating a medium severity level.
AI Analysis
Technical Summary
This vulnerability in acmailer CGI enables an attacker to inject and execute arbitrary scripts via cross-site scripting (XSS). The vulnerability is remotely exploitable without privileges and requires user interaction. The impact includes limited confidentiality and integrity loss, with no availability impact. The affected versions are all releases before 4.1.2 and 1.2.2.
Potential Impact
Successful exploitation can lead to execution of arbitrary scripts in the user's browser, potentially allowing theft of sensitive information or manipulation of web content within the affected application context. The impact is limited to confidentiality and integrity, with no direct effect on system availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with untrusted input and consider implementing web application firewalls or input sanitization as temporary mitigations.
CVE-2026-66358: Cross-site scripting (XSS) in Extra Innovation Inc. acmailer CGI
Description
CVE-2026-66358 is a cross-site scripting (XSS) vulnerability in Extra Innovation Inc.'s acmailer CGI product. This flaw allows an attacker to execute arbitrary scripts in the context of the affected application, potentially leading to limited confidentiality and integrity impacts. The vulnerability affects versions prior to 4.1.2 and 1.2.2. The CVSS v3.0 base score is 6.1, indicating a medium severity level.
CVSS v3.0
Score 6.1medium
Affected software
Extra Innovation Inc.
acmailer CGI
Extra Innovation Inc.
acmailer DB
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in acmailer CGI enables an attacker to inject and execute arbitrary scripts via cross-site scripting (XSS). The vulnerability is remotely exploitable without privileges and requires user interaction. The impact includes limited confidentiality and integrity loss, with no availability impact. The affected versions are all releases before 4.1.2 and 1.2.2.
Potential Impact
Successful exploitation can lead to execution of arbitrary scripts in the user's browser, potentially allowing theft of sensitive information or manipulation of web content within the affected application context. The impact is limited to confidentiality and integrity, with no direct effect on system availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with untrusted input and consider implementing web application firewalls or input sanitization as temporary mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- jpcert
- Date Reserved
- 2026-08-10T06:57:22.734Z
- Cvss Version
- 3.0
- State
- PUBLISHED
Threat ID: 6a853983c6e8be033233031b
Added to database: 08/19/2026, 05:05:07 UTC
Last enriched: 09/11/2026, 10:03:55 UTC
Last updated: 10/02/2026, 02:46:05 UTC
Views: 65
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