critical Known exploitedREV. 01
CVE-2023-1671Sophos Web Appliance — Pre-Auth Command Injection (warn-proceed)
The warn-proceed handler of the Sophos Web Appliance passes attacker-supplied input into a shell command before any login is required, so anyone who can reach the appliance runs arbitrary code on it.
Read the risk
THE VITAL STATS- CVSS score
- 9.8/ 10 CVSS v3.1
- EPSS probability
- 100% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2023-04-04
- Added to KEV
- 2023-11-16
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- initial access
- MITRE ATT&CK
- T1190, T1059
- Severity
- critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attacker needsNetwork access to a Sophos Web Appliance older than 4.3.10.4. No credentials needed.
Fixed inSophos Web Appliance 4.3.10.4
Behind the card
4 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02Vendor advisorySophos security advisorysophos.com
- 03ExploitPublic command injection exploitpacketstormsecurity.com
- 04CISACISA Known Exploited Vulnerabilities entrycisa.gov
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| title, summary, cvss, severity, exploitation.attack_complexity, exploitation.prerequisites, exploitation.exploit_available, remediation, recommended_action, references | nvd.nist.gov | 2026-08-07 | claude-code | high |
| exploitation.known_exploited | cisa.gov | 2026-08-07 | claude-code | high |
| epss | api.first.org | 2026-08-07 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.