VulnerabilityPublished 10 Mar 2026

CVE-2025-13902: Schneider Electric Modicon Controllers M241/M251 · Cross-site Scripting

Affects Schneider Electric Modicon Controllers M241/M251Source CVE Database V5

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Not known to be exploited · CVSS 5.1 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score

5.1Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: Low
Subsequent system integrity: Low
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Subsequent System.
Subsequent system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Subsequent System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Schneider ElectricModicon Controllers M241/M251	Affected =Versions prior to 5.4.13.12	Fixed in–
Schneider ElectricModicon Controllers M258/LMC058	Affected =All versions	Fixed in–

AI-suggested

To mitigate CVE-2025-13902, organizations should immediately upgrade Schneider Electric Modicon M241 and M251 controllers to firmware version 5.4.13.12 or later, where the vulnerability is addressed. If patching is not immediately feasible, restrict access to the controller’s web interface to trusted networks and users only, employing network segmentation and strong access controls. Implement multi-factor authentication (MFA) for all users accessing the device to reduce the risk of credential compromise. Monitor logs for unusual authenticated activity that could indicate attempts to exploit this vulnerability. Additionally, disable or limit the use of web interface features that allow user input or interaction if possible. Security teams should conduct regular vulnerability assessments and penetration testing on industrial control systems to detect similar input validation issues. Finally, educate operational technology personnel about the risks of XSS and the importance of cautious interaction with web interfaces in industrial environments.

Description

CVE-2025-13902 is a medium-severity cross-site scripting (XSS) vulnerability affecting Schneider Electric Modicon Controllers M241 and M251 prior to version 5.4.13.12. It arises from improper neutralization of input during web page generation, allowing authenticated attackers to inject malicious JavaScript. The attack requires the victim to interact by hovering over a crafted element on the affected web interface, which then executes the injected script in the victim's browser. This vulnerability does not require user authentication to be bypassed but does require the attacker to have some level of authenticated access to the device. Exploitation can lead to session hijacking, unauthorized actions, or information disclosure within the context of the victim’s browser session. No known exploits are currently reported in the wild. Organizations using these Schneider Electric controllers should prioritize patching to prevent potential exploitation.

Impact

The impact of CVE-2025-13902 is significant for organizations relying on Schneider Electric Modicon M241 and M251 controllers, especially in industrial and critical infrastructure environments. Successful exploitation can lead to unauthorized execution of JavaScript in the context of a legitimate user’s browser session, potentially allowing attackers to hijack sessions, manipulate controller settings, or exfiltrate sensitive data. This can disrupt industrial processes, cause operational downtime, or facilitate further attacks within the network. Since these controllers are often part of supervisory control and data acquisition (SCADA) systems, the vulnerability could indirectly affect the availability and integrity of critical infrastructure such as manufacturing plants, energy grids, and water treatment facilities. Although exploitation requires authenticated access, insider threats or compromised credentials could enable attackers to leverage this vulnerability. The lack of known exploits currently reduces immediate risk, but the medium severity score and the strategic importance of affected systems warrant prompt remediation to prevent escalation.

CWE-79Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-069-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-069-02.pdf (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Mar 2026, 19:30 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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