CVE-2015-3296 NodeBB Cross-site Scripting Vulnerability in Markdown Processing

Medium 6.1 Published Updated

Remote attackers can inject arbitrary web script or HTML into NodeBB forums via javascript or data URLs, potentially compromising user sessions.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is CVE-2015-3296?

CVE-2015-3296 is a medium-severity cross-site scripting vulnerability in n/a, published on 21 Sep 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Multiple cross-site scripting (XSS) vulnerabilities in NodeBB before 0.7 allow remote attackers to inject arbitrary web script or HTML via vectors related to (1) javascript: or (2) data: URLs.

Weakness: CWE-79

Which versions are affected by CVE-2015-3296?

4 open source packages ship an affected version, including nodebb and nodebb-plugin-markdown. It affects 1 product.

PackageAffectedFixed in
nodebb npmAll versions0.70
nodebb npmAll versions0.70
nodebb-plugin-markdown npmAll versions5.1.1
nodebb-plugin-markdown npmAll versions5.1.1

Products include Nodebb Nodebb.

How do I fix CVE-2015-3296?

Upgrade nodebb to 0.70 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-2015-3296 being exploited?

There is no known exploitation of CVE-2015-3296 in the wild and no public exploit code.

Sources

Also known as GHSA-9g4f-5rpg-4948.

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