CVE-2023-42796

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-10 · updated 2026-06-17
Weakness: CWE-22

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. By exploring active session IDs, the vulnerability could potentially be leveraged to escalate privileges to the administrator role.

Affected products

Siemens Cp-8031 Firmware: before 05.11 — fixed in 05.11
Siemens Cp-8050 Firmware: before 05.11 — fixed in 05.11

How to fix

Upgrade to a fixed version: Siemens Cp-8031 Firmware 05.11; Siemens Cp-8050 Firmware 05.11. Check the vendor advisory for mitigations.

References

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