Sophos patches three issues in the Sophos Web Security appliance, one of them rated as critical

April 10, 2023  By Pierluigi Paganini


Sophos addressed three vulnerabilities in Sophos Web Appliance, including a critical flaw that can lead to code execution.

Cybersecurity vendor Sophos addressed three vulnerabilities in Sophos Web Appliance, including a critical flaw, tracked as CVE-2023-1671 (CVSS score of 9.8), that can lead to code execution.

The CVE-2023-1671 flaw is a pre-auth command injection issue that resides in the warn-proceed handler, it affects appliances older than version 4.3.10.4.

The company also addressed a high-severity code execution issue, tracked as CVE-2022-4934. The issue is a post-auth command injection vulnerability that resides in the exception wizard, it can allow administrators to execute arbitrary code.

The vendor also fixed a medium-severity reflected cross-site scripting (XSS) vulnerability tracked as CVE-2020-36692. An attacker can exploit the vulnerability to execute JavaScript code in the victim’s browser.

The attacker can trigger the flaw by tricking the victim into submitting a malicious form on an attacker-controlled website while logged into Sophos Web Appliance.

All the above vulnerabilities were discovered and responsibly disclosed to Sophos by external security researchers via the Sophos bug bounty program.

Sophos Web Appliance will reach end-of-life (EoL) status on July 20, 2023. The company recommends customers replace the appliances with Sophos Firewall.

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Pierluigi Paganini

(SecurityAffairs – hacking, Sophos)



Pierluigi Paganini
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.





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