{"id":"CVE-2018-7831","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-7831","generatedAt":"2026-10-28T22:20:32.337Z","title":"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…","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.","published":"2018-11-30T19:29:01.000Z","lastModified":"2026-06-17T02:03:49.000Z","status":"Modified","sourceIdentifier":"cybersecurity@se.com","cvss":{"version":"3.0","score":8.8,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-79","CWE-352"],"affected":["schneider-electric/modicom m340 firmware","schneider-electric/modicom premium firmware","schneider-electric/modicom quantum firmware","schneider-electric/modicom bmxnor0200h firmware"],"epss":{"score":0.00635,"percentile":0.5024,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.64%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/","tags":["Vendor Advisory"],"source":"cybersecurity@se.com"},{"url":"https://www.tenable.com/security/research/tra-2018-38","tags":["Exploit","Third Party Advisory"],"source":"cybersecurity@se.com"},{"url":"https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/research/tra-2018-38","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-7831","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}