CVE-2021-25268

Name: CVE-2021-25268
Creator: NVD / NIST
Published: 2022-05-05T18:15:09.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.4/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2021-25268 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from MySophos admin to SFOS admin in Sophos Firewall older than version 19.0 GA.. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.4/10

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

EPSS Probability

0.93%

55.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Sophos	Firewall Firmware	< 19.0

References

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

Timeline

Published: May 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25268?

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

How severe is CVE-2021-25268?

CVE-2021-25268 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25268?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25268?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST