CVE-2023-40221Network attack vector

Browser script execution via unfiltered MAIL_RCV

Published Sep 18, 2023 · Updated Aug 2, 2024

Stored code injection in Socomec MODULYS GP web firmware 01.12.10 allows remote attackers to execute JavaScript through MAIL_RCV. The MAIL SERVER view renders the stored MAIL_RCV value without filtering code, causing attacker-supplied script to run when the page loads. Exploitation requires a legitimate user to open NOTIFICATION/MAIL SERVER, and the script executes in that user's browser context.

CVSS severity8.8
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored code injection in Socomec MODULYS GP web firmware 01.12.10 allows remote attackers to execute JavaScript through MAIL_RCV. The MAIL SERVER view renders the stored MAIL_RCV value without filtering code, causing attacker-supplied script to run when the page loads. Exploitation requires a legitimate user to open NOTIFICATION/MAIL SERVER, and the script executes in that user's browser context.

The record

CVE
CVE-2023-40221
Published
Sep 18, 2023
Updated
Aug 2, 2024
Vendor
Socomec
Product
MODULYS GP
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=01.12.10
  2. Affected versionversion=v01.12.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Socomec · MODULYS GPversion=01.12.10; version=v01.12.10

Published CVSS scores

8.8CISA ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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