NVD / CVE Program· CNA Sophos

CVE-2023-1671: A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution…

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: Now (action score 99/100)

CISA has confirmed exploitation in the wild (Nov 16, 2023). Remediation deadline for US federal agencies: Dec 7, 2023.
A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
Probability of exploitation in the next 30 days: 99.9% (FIRST EPSS); higher than 99.9% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

BDU:2023-02307

Published: Apr 4, 2023
Updated: Jun 17, 2026
EPSS: 99.9% · 99th percentile
CWE: CWE-77

Report tools

JSON

Action score

Now

Patch today or shut off access.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 30 / 30 · 99.9%

CISA SSVC decision

Exploitation: active
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 9.8
CNA · Sophos: 9.8; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 16, 2023. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Dec 7, 2023.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
sophos	web appliance	cpe:2.3:a:sophos:web_appliance

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Sophos). Independent of NVD's CPE analysis and usually ahead of it.

Sophos Sophos Web Appliance
- unspecified and later · before 4.3.10.4affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

sophos web appliancebefore 4.3.10.4

Same product

sophos: all records

Other highest-scoring records for the same primary product.

CVE-2017-6182In Sophos Web Appliance (SWA) before 4.3.1.2, a section of the machine's interface responsible for generating reports was vulnerable to…
44Plan
CVE-2013-4984The close_connections function in /opt/cma/bin/clear_keys.pl in Sophos Web Appliance before 3.7.9.1 and 3.8 before 3.8.1.1 allows local…
40Plan
CVE-2016-9554The Sophos Web Appliance Remote / Secure Web Gateway server (version 4.2.1.3) is vulnerable to a Remote Command Injection vulnerability in…
36Monitor

Published before and after this one in the same product

← EarlierCVE-2020-36692Apr 4, 2023 · A reflected XSS via POST vulnerability in report scheduler of Sophos Web Appliance versions older than 4.3.10.4 allows execution of…
21Monitor
← EarlierCVE-2022-4934Apr 4, 2023 · A post-auth command injection vulnerability in the exception wizard of Sophos Web Appliance older than version 4.3.10.4 allows…
29Monitor
Later →CVE-2023-33336Jun 29, 2023 · Reflected cross site scripting (XSS) vulnerability was discovered in Sophos Web Appliance v4.3.9.1 that allows for arbitrary code to be…
19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Exploit-DB entry ×1
Nuclei detection template ×1
Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	3 repositories	2023-04-23 → 2023-05-17
Exploit-DB entry	webapps	2023-04-25
Nuclei detection template	Nuclei template CVE-2023-1671	—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.