CVE-2018-3764 Cross-site scripting in Nextcloud Contacts application
Privileged users can inject malicious scripts into group names, leading to stored XSS attacks against other users in Nextcloud Contacts.
- 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-2018-3764?
CVE-2018-3764 is a medium-severity cross-site scripting vulnerability in Nextcloud Contacts application, published on 5 Jul 2018. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
In Nextcloud Contacts before 2.1.2, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction. The missing sanitization only affected group names, hence malicious search results could only be crafted by privileged users like admins or group admins.
Weakness: CWE-79
Which versions are affected by CVE-2018-3764?
It affects 1 product.
Products include Nextcloud Contacts.
How do I fix CVE-2018-3764?
No fix has been published for CVE-2018-3764 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-2018-3764 being exploited?
There is no known exploitation of CVE-2018-3764 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Contacts application
Sources
Also known as GHSA-hcc2-pgmx-p7rw.