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Vulnerability record · CVE-2021-25268 · published 5 May 2022

CVE-2021-25268: Sophos firewall firmware cross-site scripting vulnerability

Sophos · Firewall Firmware

Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from MySophos admin to SFOS admin in Sophos Firewall older than version 19.0 GA.

8.4 CVSS 3.1 High EPSS 0.91% · top 41.6% CWE-79 · Cross-site scripting
8.4CVSS 3.1 base score, v2 6.0
0.91%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from MySophos admin to SFOS admin in Sophos Firewall older than version 19.0 GA.

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.sophos.com/en-us/security-advisories/sophos-sa-20220505-sfos-19-0-0 Vendor Advisory
https://www.sophos.com/en-us/security-advisories/sophos-sa-20220505-sfos-19-0-0 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-6704Sophos firewall firmware os command injection vulnerabilityAn arbitrary file writing vulnerability in the Secure PDF eXchange (SPX) feature of Sophos Firewall versions older than 21.0 MR2 (21.0.2) can lead to…EPSS 9.5%9.8CVE-2025-7624Sophos firewall firmware sql injection vulnerabilityAn SQL injection vulnerability in the legacy (transparent) SMTP proxy of Sophos Firewall versions older than 21.0 MR2 (21.0.2) can lead to remote cod…EPSS 8.5%9.8CVE-2024-12727Sophos firewall firmware sql injection vulnerabilityA pre-auth SQL injection vulnerability in the email protection feature of Sophos Firewall versions older than 21.0 MR1 (21.0.1) allows access to the …EPSS 1.4%9.8CVE-2024-12728Sophos firewall firmware vulnerabilityA weak credentials vulnerability potentially allows privileged system access via SSH to Sophos Firewall older than version 20.0 MR3 (20.0.3).EPSS 0.94%8.8CVE-2025-7382Sophos firewall firmware os command injection vulnerabilityA command injection vulnerability in WebAdmin of Sophos Firewall versions older than 21.0 MR2 (21.0.2) can lead to adjacent attackers achieving pre-a…EPSS 4.8%8.8CVE-2024-12729Sophos firewall firmware code injection vulnerabilityA post-auth code injection vulnerability in the User Portal allows authenticated users to execute code remotely in Sophos Firewall older than version…EPSS 1.3%8.4CVE-2021-25267Sophos firewall firmware cross-site scripting vulnerabilityMultiple XSS vulnerabilities in Webadmin allow for privilege escalation from admin to super-admin in Sophos Firewall older than version 19.0 GA.EPSS 1.1%8.1CVE-2024-13974Sophos firewall firmware vulnerabilityA business logic vulnerability in the Up2Date component of Sophos Firewall older than version 21.0 MR1 (20.0.1) can lead to attackers controlling the…EPSS 7.4%

Source: NIST National Vulnerability Database (record CVE-2021-25268), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.