Multiple XSS vulnerabilities in Webadmin allow for privilege escalation from MySophos admin to SFOS admin in Sophos Firewall older than ver…

published 2022-05-05 4y ago modified 2026-06-17 4mo ago also EUVD-2021-12179

cvss: 8.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

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

Patch / fix

fixed in 1

Sophos Sophos Firewall 19.0 GA

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Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.4	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
NVD	3.1	8.4	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
NVD	2.0	6.0	AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

Sophos Sophos Firewall

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

sophos.com /en-us/security-advisories/sophos-sa-20220505-sfos-19-0-0
vendor-advisory

Sources

CVE List CVE-2021-25268
NVD CVE-2021-25268

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