Email and Web Appliance
CVE-2023-1671: Web Appliance Command Injection
A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.
Published
ExploitedYes, in CISA KEVAdded 16 Nov 2023
Ransomware useNot reportedPer CISA
SeverityCRITICALCVSS 3.1 9.8
EPSS100%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Sophos Web Appliance unspecified | 4.3.10.4 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.
Exploitation
CISA lists this CVE as exploited in the wild since 16 Nov 2023.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.