CVE-2021-25268

CVE-2021-25268 is a high-severity vulnerability in Sophos Firewall Firmware with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

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.

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 3.x base score of 8.4, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25268 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25268?
CVE-2021-25268 affects Sophos Firewall Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25268?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-25268 published?
CVE-2021-25268 was published on 2022-05-05 and last updated on 2026-06-17.

References

Affected products (1)

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