CVE-2020-17551 Cross-site scripting (XSS)

Medium 4.8 Published Updated

Cross-site scripting in ImpressCMS admin module allows attackers to execute arbitrary remote code.

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
Available

What is CVE-2020-17551?

CVE-2020-17551 is a medium-severity cross-site scripting vulnerability in n/a, published on 7 Oct 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

ImpressCMS 1.4.0 is affected by XSS in modules/system/admin.php which may result in arbitrary remote code execution.

Weakness: CWE-79

Which versions are affected by CVE-2020-17551?

2 open source packages ship an affected version, including impresscms/impresscms. It affects 1 product.

PackageAffectedFixed in
impresscms/impresscms PackagistAll versions1.4.1
impresscms/impresscms PackagistAll versions1.4.1

Products include Impresscms Impresscms.

How do I fix CVE-2020-17551?

Upgrade impresscms/impresscms to 1.4.1 or later.

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-2020-17551 being exploited?

There is no known exploitation of CVE-2020-17551 in the wild and no public exploit code.

Sources

Also known as GHSA-j29g-g982-pwpv.

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