What is CVE-2025-3899?

CVE-2025-3899 is a medium-severity vulnerability in Schneider Electric Modicon Controllers M241/m251, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-06-10.

How severe is CVE-2025-3899?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Schneider Electric Modicon Controllers M241/m251

CVE-2025-3899

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists in Certificates page on Webserver that could cause an unvalidated data injected by authenticated malicious user leading to mo…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (3.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Schneider Electric Modicon Controllers M241/m251 — versions Versions prior to 5.3.12.51

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cybersecurity@se.com

Frequently asked questions

What is CVE-2025-3899?: CVE-2025-3899 is a medium-severity vulnerability in Schneider Electric Modicon Controllers M241/m251, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-06-10.
How severe is CVE-2025-3899?: Medium severity. CVSS v3 base score is 5.4 out of 10.