WAGO: Multiple vulnerabilities in web-based management of multiple products
Act Now9.8VDE-2022-060Feb 27, 2023
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
Multiple vulnerabilities exist in the Web-Based Management (WBM) interface of WAGO PLCs and controllers. The configuration backend can be accessed without authentication in some cases, allowing root-level write operations. Additionally, CORS misconfiguration enables reflected XSS attacks. Affected products include Compact Controller 100, Edge Controller, PFC100/200, and Touch Panel 600 series (Standard, Advanced, and Marine lines) running firmware versions FW16 through FW23. No patches are currently available for affected firmware versions.
What this means
What could happen
An attacker on your network can access the web-based management interface of WAGO controllers without credentials and perform administrative actions, including modifying PLC configuration or firmware. This could allow them to alter control logic, change setpoints, or stop production operations.
Who's at risk
Manufacturing operations using WAGO Compact Controllers, Edge Controllers, PFC controllers, and Touch Panel 600 series for process control and machine automation. Any facility relying on these devices for production operations, including discrete manufacturing plants and continuous process industries, should implement immediate network isolation measures.
How it could be exploited
An attacker on the network sends HTTP requests directly to the web-based management interface on port 80/443 of the WAGO device. Because the configuration backend lacks proper authentication in some cases, the attacker can read and write configuration data with root-level privileges. CORS misconfiguration also allows the attacker to trigger these actions from a malicious website visited by an operator.
Prerequisites
- Network access to HTTP/HTTPS ports (80/443) of the WAGO device
- Device must be reachable from attacker's network location
- No valid credentials required for exploitation
Remotely exploitableNo authentication requiredLow complexityHigh CVSS score (9.8)No patch available for current firmware versionsAffects industrial control equipment
Affected products (14)
14 with fix
ProductAffected VersionsFix Status
Compact Controller 100FW16≤ FW22FW24 or FW22 Patch 1
Compact Controller 100FW23FW24 or FW22 Patch 1
Edge ControllerFW23FW24 or FW22 Patch 1
Edge ControllerFW18≤ FW22FW24 or FW22 Patch 1
PFC100FW23FW24 or FW22 Patch 1
PFC100FW16≤ FW22FW24 or FW22 Patch 1
PFC200FW16≤ FW22FW24 or FW22 Patch 1
PFC200FW23FW24 or FW22 Patch 1
Remediation & Mitigation
0/4
Do now
0/3WORKAROUNDDisable web-based management (WBM) on WAGO controllers if not actively required for administration or commissioning, using command-line tools
WORKAROUNDRestrict network access to WAGO controllers at the firewall; allow HTTP/HTTPS traffic (ports 80, 443) only from authorized engineering workstations or administrative networks
HARDENINGDo not connect WAGO controllers directly to the internet; ensure they are placed on an isolated OT network segment with strict ingress/egress rules
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXInstall firmware version FW22 Patch 1 or FW24 or higher when available from your device vendor, coordinating with your maintenance window
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