CVE-2021-25273 Cross-site scripting in Sophos UTM

Medium 4.8 Published 29 Jul 2021 Updated 3 Aug 2024

Stored XSS in Sophos UTM allows administrators to execute arbitrary code via quarantined email details, requiring an upgrade to mitigate.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-25273?

CVE-2021-25273 is a medium-severity cross-site scripting vulnerability in Sophos UTM, published on 29 Jul 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

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

Weakness: CWE-79

Which versions are affected by CVE-2021-25273?

It affects 1 product.

Products include Sophos Unified Threat Management.

How do I fix CVE-2021-25273?

No fix has been published for CVE-2021-25273 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-25273 being exploited?

There is no known exploitation of CVE-2021-25273 in the wild and no public exploit code.

Sources

Also known as GHSA-4p5x-52qw-grgg.