CVE-2018-7831

Name: CVE-2018-7831
Creator: NVD / NIST
Published: 2018-11-30T19:29:00.593+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.64%

Last modified Jun 17, 2026

CVE-2018-7831 is a vulnerability of currently unknown severity. An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an attacker to send a specially crafted URL to a currently authenticated web server user to execute a password change on the web server.. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an attacker to send a specially crafted URL to a currently authenticated web server user to execute a password change on the web server.

Metrics

EPSS Probability

0.64%

45.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modicom M340 Firmware	All versions
Schneider-Electric	Modicom Premium Firmware	All versions
Schneider-Electric	Modicom Quantum Firmware	All versions
Schneider-Electric	Modicom Bmxnor0200h Firmware	All versions

References

https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
https://www.tenable.com/security/research/tra-2018-38Exploit, Third Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/Vendor Advisory
https://www.tenable.com/security/research/tra-2018-38Exploit, Third Party Advisory

Timeline

Published: Nov 30, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7831?

How severe is CVE-2018-7831?

Severity scoring for CVE-2018-7831 is pending analysis. The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7831?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7831?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST