Unauthenticated configuration changes via reflected POST input
Published Dec 9, 2025 · Updated Dec 9, 2025
Reflected XSS in Phoenix Contact FL SWITCH 2xxx and FL NAT firmware before 3.50 allows remote attackers to alter WBM settings. The pxc_vlanIntfCfg.php handler reflects unneutralized POST input in WBM, causing an authenticated user's browser to submit configuration changes. Exploitation requires an authenticated user to be tricked; httpOnly cookies prevent session theft, and access remains limited to parameters exposed by the web application.
Summary
What happened
Reflected XSS in Phoenix Contact FL SWITCH 2xxx and FL NAT firmware before 3.50 allows remote attackers to alter WBM settings. The pxc_vlanIntfCfg.php handler reflects unneutralized POST input in WBM, causing an authenticated user's browser to submit configuration changes. Exploitation requires an authenticated user to be tricked; httpOnly cookies prevent session theft, and access remains limited to parameters exposed by the web application.
The record
- CVE
- CVE-2025-41747
- Published
- Dec 9, 2025
- Updated
- Dec 9, 2025
- Vendor
- Phoenix Contact
- Product
- FL SWITCH 2204-2TC-2SFX
- Classifications
- CWE-79, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 9, 2025CVE publishedPublication date reported by the CVE source.
- Dec 9, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.0.0 <3.50
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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