CVE-2025-41750: Reflected XSS vulnerability in pxc_PortCfg.php

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-09 · updated 2026-10-07
Weakness: CWE-79

Description

An XSS vulnerability in pxc_PortCfg.php can be used by an unauthenticated remote attacker to trick an authenticated user to click on the link provided by the attacker in order to change parameters available via web based management (WBM). The vulnerability does not provide access to system-level resources such as operating system internals or privileged functions. Access is limited to device configuration parameters that are available in the context of the web application. The session cookie is secured by the httpOnly Flag. Therefore an attacker is not able to take over the session of an authenticated user.

Affected products

Phoenixcontact Fl Nat 2008 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Nat 2208 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Nat 2304-2Gc-2Sfp Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2005 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2008 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2008F Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2016 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2105 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2108 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2116 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2204-2Tc-2Sfx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2205 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2206-2Fx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2206-2Fx Sm Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2206-2Fx Sm St Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2206-2Fx St Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2206-2Sfx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2206-2Sfx Pn Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2206C-2Fx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2207-Fx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2207-Fx Sm Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2208 Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2208 Pn Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2208C Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2212-2Tc-2Sfx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2214-2Fx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2214-2Fx Sm Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2214-2Sfx Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2214-2Sfx Pn Firmware: before 3.50 — fixed in 3.50
Phoenixcontact Fl Switch 2216 Firmware: before 3.50 — fixed in 3.50

How to fix

Upgrade to a fixed version: Phoenixcontact Fl Nat 2008 Firmware 3.50; Phoenixcontact Fl Nat 2208 Firmware 3.50; Phoenixcontact Fl Nat 2304-2Gc-2Sfp Firmware 3.50; Phoenixcontact Fl Switch 2005 Firmware 3.50; Phoenixcontact Fl Switch 2008 Firmware 3.50; Phoenixcontact Fl Switch 2008F Firmware 3.50; Phoenixcontact Fl Switch 2016 Firmware 3.50; Phoenixcontact Fl Switch 2105 Firmware 3.50; Phoenixcontact Fl Switch 2108 Firmware 3.50; Phoenixcontact Fl Switch 2116 Firmware 3.50; Phoenixcontact Fl Switch 2204-2Tc-2Sfx Firmware 3.50; Phoenixcontact Fl Switch 2205 Firmware 3.50. Check the vendor advisory for mitigations.

References

https://certvde.com/de/advisories/VDE-2025-071

Get alerted when CVE-2025-41750 or the next vulnerability affects your stack