CVE-2018-4842

What it is

A vulnerability has been identified in SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.4.1), SCALANCE X-200RNA switch family (All versions < V3.2.7), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < V4.1.3). A remote, authenticated attacker with access to the configuration web server could be able to store script code on the web site, if the HRP redundancy option is set. This code could be executed in the web browser of victims visiting this web site (XSS), affecting its confidentiality, integrity and availability. User interaction is required for successful exploitation, as the user needs to visit the manipulated web site. At the stage of publishing this security advisory no public exploitation is known. The vendor has confirmed the vulnerability and provides mitigations to resolve it.

At a glance

Exploitability

Can be exploited over the network with an admin-level account, but needs a user to act. Limited direct impact.

Exploit odds

0.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2018-06-14 16:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:59 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.8% in the next 30 days (EPSS).
• Severity: 4.8 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2018-06-14 16:29 UTC

Last modified

2026-06-17 01:59 UTC

Exploit probability

0.8% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Modified

Affected

• Siemens Scalance x200irt Firmware < 5.4.1
• Siemens Scalance x300 Firmware
• Siemens Scalance x200 Firmware < 5.2.3

Attack profile CVSS 3.0 · 4.8

Attack vector

Network

Complexity

Low

Privileges needed

High

User interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-4842.md and follow it. Check whether this project is affected by CVE-2018-4842. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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