Stored cross-site scripting in Modicon M241 and Modicon M251 - CVE-2025-3899
Published: June 25, 2025
Vulnerability identifier: #VU111937
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2025-3899
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the Certificates page. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
Modicon M241
Modicon M251
Modicon M251
How to mitigate CVE-2025-3899
Install updates from vendor's website.
Modicon M241 - update to 5.3.12.51
Modicon M251 - update to 5.3.12.51
Modicon M251 - update to 5.3.12.51