What is the CVSS score of CVE-2021-25273?

CVE-2021-25273 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.8%.

Is there a public PoC exploit available for CVE-2021-25273?

Yes, a public proof-of-concept exploit is available for CVE-2021-25273. Prioritise patching immediately. EPSS: 0.8%.

Unified Threat Management CVE-2021-25273

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2021-07-29 security-alert@sophos.com

XSS Unified Threat Management Sophos

4.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.8 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Jul 29, 2021 - 20:15 nvd

MEDIUM 4.8

DescriptionNVD

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

AnalysisAI

Stored XSS can execute as administrator in quarantined email detail view in Sophos UTM before version 9.706. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Stored XSS can execute as administrator in quarantined email detail view in Sophos UTM before version 9.706. Affected products include: Sophos Unified Threat Management. Version information: version 9.706..

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.