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Vulnerability record · CVE-2021-25273 · published 29 July 2021

CVE-2021-25273: Sophos unified threat management cross-site scripting vulnerability

Sophos · Unified Threat Management

Stored XSS can execute as administrator in quarantined email detail view in Sophos UTM before version 9.706.

4.8 CVSS 3.1 Medium EPSS 0.83% · top 44.1% CWE-79 · Cross-site scripting
4.8CVSS 3.1 base score, v2 3.5
0.83%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Stored XSS can execute as administrator in quarantined email detail view in Sophos UTM before version 9.706.

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

Affected products

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

References

LinkTags
http://seclists.org/fulldisclosure/2021/Dec/3 ExploitMailing ListThird Party Advisory
https://community.sophos.com/utm-firewall/b/blog/posts/utm-up2date-9-706-released Release NotesVendor Advisory
http://seclists.org/fulldisclosure/2021/Dec/3 ExploitMailing ListThird Party Advisory
https://community.sophos.com/utm-firewall/b/blog/posts/utm-up2date-9-706-released Release NotesVendor Advisory

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Related vulnerabilities

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

9.8CVE-2020-25223Sophos SG UTM WebAdmin OS command injection allows remote code executionSophos SG UTM WebAdmin contains an OS command injection flaw (CWE-78) that permits remote code execution. It affects versions before v9.705 MR5, v9.6…KEVEPSS 97%analysed8.8CVE-2022-0386Sophos unified threat management sql injection vulnerabilityA post-auth SQL injection vulnerability in the Mail Manager potentially allows an authenticated attacker to execute code in Sophos UTM before version…EPSS 1.2%7.8CVE-2022-0652Sophos unified threat management sensitive information in log file vulnerabilityConfd log files contain local users', including root’s, SHA512crypt password hashes with insecure access permissions. This allows a local attacker to…EPSS 0.19%7.8CVE-2014-2537Sophos unified threat management software vulnerabilityMemory leak in the TCP stack in the kernel in Sophos UTM before 9.109 allows remote attackers to cause a denial of service (memory consumption) via u…EPSS 3.1%4.3CVE-2012-3238Astaro security gateway software cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in the Backup/Restore component in WebAdmin in Astaro Security Gateway before 8.305 allows remote attackers …EPSS 3.5%6.1CVE-2026-42897Microsoft Exchange Server XSS enables spoofingMicrosoft Exchange Server and Exchange Server Subscription Edition fail to neutralize input during web page generation, a cross-site scripting flaw (…KEVEPSS 0.52%analysed6.1CVE-2025-48700Zimbra Classic UI stored XSS via crafted email HTMLZimbra Collaboration Suite Classic UI fails to properly sanitize HTML content in email messages, allowing crafted tag structures and attribute values…KEVEPSS 1.7%analysed6.1CVE-2025-66376Zimbra Collaboration Classic UI stored XSS via CSS @import in emailZimbra Collaboration Suite 10 before 10.0.18 and 10.1 before 10.1.13 allows stored cross-site scripting in the Classic UI through CSS @import directi…KEVEPSS 20%analysed

Source: NIST National Vulnerability Database (record CVE-2021-25273), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.