Threats / Sophos / CVE-2023-1671
CVE-2023-1671
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Sophos Web Appliance vulnerability
Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows remote code execution.
Verdict
Today item — known-exploited.
A command injection flaw in Sophos Web Appliance enables unauthenticated remote code execution. The vulnerability is actively exploited in the wild with high exploitability (EPSS 0.94), posing immediate risk to deployed instances.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
629 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-11-16).
Probability (EPSS)
EPSS 0.99999 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Sophos, Web Appliance. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-77 Command Injection — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious request targeting the warn-proceed handler with injected shell commands.
Business
Attacker gains arbitrary code execution on the appliance with its network privileges and access to protected resources.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute commands to establish persistence, escalate privileges, or pivot to internal network segments.
Business
The compromised appliance becomes a foothold for lateral movement, potentially exposing internal systems and data.
3
Lateral reach — past segmentation narrative 3
Attacker
I exfiltrate configuration data, credentials, or traffic logs from the appliance.
Business
Sensitive security posture information and encrypted traffic metadata are exposed to the attacker.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05