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CVE-2023-1671

Sophos Web Appliance Command Injection

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 100.0%
  1. Published4 Apr 2023
  2. Added to CISA KEV16 Nov 2023
  3. Remediation due7 Dec 2023
Actively exploited (CISA KEV)

Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution.

Added to KEV: 16 Nov 2023Federal remediation due: 7 Dec 2023

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Sophos Web Appliance< 4.3.10.4

Remediation

Fixed in
Sophos Web Appliance≥ 4.3.10.4

References

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Frequently asked

Is CVE-2023-1671 being actively exploited?

Yes. CVE-2023-1671 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 16 Nov 2023.

How severe is CVE-2023-1671?

CVE-2023-1671 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 100.0% probability of exploitation.

Which products are affected by CVE-2023-1671?

Affected products include Sophos Web Appliance.

How do I fix CVE-2023-1671?

Upgrade affected software to a fixed version, for example Sophos Web Appliance 4.3.10.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-1671 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.