CVE-2018-8915 Cross-site scripting in Calendar

Medium 6.5 Published 10 May 2018 Updated 16 Sep 2024

Authenticated attackers can inject arbitrary scripts via the title parameter in Synology Calendar's Notification Center, potentially compromising user sessions.

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

What is CVE-2018-8915?

CVE-2018-8915 is a medium-severity cross-site scripting vulnerability in Synology Calendar, published on 10 May 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Cross-site scripting (XSS) vulnerability in Notification Center in Synology Calendar before 2.1.1-0502 allows remote authenticated users to inject arbitrary web script or HTML via title parameter.

Weakness: CWE-79

Which versions are affected by CVE-2018-8915?

It affects 1 product.

Products include Synology Calendar.

How do I fix CVE-2018-8915?

No fix has been published for CVE-2018-8915 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-2018-8915 being exploited?

There is no known exploitation of CVE-2018-8915 in the wild and no public exploit code.

Sources

Also known as GHSA-jc52-h9fr-wjmq.