# Sophos Web Appliance: Command Injection (CVE-2023-1671) · pwn.watch

> Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution. Added to CISA KEV on 2023-11-16.

Page: https://pwn.watch/i/sophos-web-appliance-cve-2023-1671 · generated 2026-10-22T22:00:08.805Z

## Status
- Severity: critical · status: closed · patch: patched
- Product: Sophos Web Appliance
- Started: 2023-11-16 · closed: 2023-11-16
- CVEs: CVE-2023-1671
- Affected: See vendor advisory / CISA notes (versions not always listed in KEV feed)
- Fixed in: See vendor advisory linked in sources

## Follow this incident
- RSS (one item per update): https://pwn.watch/i/sophos-web-appliance-cve-2023-1671/feed.xml
- JSON Feed: https://pwn.watch/i/sophos-web-appliance-cve-2023-1671/feed.json
- Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/sophos-web-appliance-cve-2023-1671.json
- This file: https://pwn.watch/i/sophos-web-appliance-cve-2023-1671/llms.txt

## Updates (newest first)
- 2023-11-16: CISA added CVE-2023-1671 to the KEV catalog (due 2023-12-07).

## Fix brief
# Security brief: Sophos Web Appliance: Command Injection (CVE-2023-1671)

Source: https://pwn.watch/i/sophos-web-appliance-cve-2023-1671 · status: closed (closed Nov 16, 2023) · severity: critical · updated Nov 16, 2023

## Patch status
**PATCHED: fixed releases exist. Upgrade to a fixed version.**

## What it is
Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution. Added to CISA KEV on 2023-11-16.

Severity detail: CVSS 9.8 (NVD), actively exploited (CISA KEV)

- Product: Sophos Web Appliance
- CVE / advisory ids: CVE-2023-1671

## Affected versions
- See vendor advisory / CISA notes (versions not always listed in KEV feed)

## Check whether you're affected
No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above.

## Fix
Upgrade to one of these fixed versions (or later on the same branch):
- See vendor advisory linked in sources

After upgrading, re-run the checks above and redeploy/restart the affected services.

## Latest updates
- Nov 16, 2023: CISA added CVE-2023-1671 to the KEV catalog (due 2023-12-07).

## Advisories
- [Vendor advisory: Sophos Web Appliance](https://www.sophos.com/en-us/security-advisories/sophos-sa-20230404-swa-rce) (Sophos)
- [NVD: CVE-2023-1671](https://nvd.nist.gov/vuln/detail/CVE-2023-1671) (NVD)
- [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA)

## Caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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Machine-readable: https://pwn.watch/i/sophos-web-appliance-cve-2023-1671.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.