CVE-2016-6851 Cross-site scripting in n/a

Medium 6.1 Published 15 Dec 2016 Updated 6 Aug 2024

Attackers can inject malicious scripts into the OX Guard guest reader, enabling session hijacking and unauthorized actions for users with active 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: None listed

What is CVE-2016-6851?

CVE-2016-6851 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Dec 2016. 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

An issue was discovered in Open-Xchange OX Guard before 2.4.2-rev5. Script code can be provided as parameter to the OX Guard guest reader web application. This allows cross-site scripting attacks against arbitrary users since no prior authentication is needed. Malicious script code can be executed within a user's context. This can lead to session hijacking or triggering unwanted actions via the web interface (sending mail, deleting data etc.) in case the user has an active session on the same domain already.

Weakness: CWE-79

Which versions are affected by CVE-2016-6851?

It affects 1 product.

Products include Open-Xchange Ox Guard.

How do I fix CVE-2016-6851?

No fix has been published for CVE-2016-6851 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-2016-6851 being exploited?

There is no known exploitation of CVE-2016-6851 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as GHSA-494v-jqp4-m59h.