CVE-2017-0891 Cross-site scripting in Nextcloud Server
Attackers can inject malicious scripts via unescaped error messages in Nextcloud Server, potentially leading to session hijacking or code execution.
- 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-2017-0891?
CVE-2017-0891 is a medium-severity cross-site scripting vulnerability in Nextcloud Nextcloud Server, published on 8 May 2017. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Nextcloud Server before 9.0.58 and 10.0.5 and 11.0.3 are vulnerable to an inadequate escaping of error messages leading to XSS vulnerabilities in multiple components.
Weakness: CWE-79
Which versions are affected by CVE-2017-0891?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2017-0891?
No fix has been published for CVE-2017-0891 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-2017-0891 being exploited?
There is no known exploitation of CVE-2017-0891 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Nextcloud Server
- CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server
- CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server
- CVE-2018-3775 Auth bypass in Nextcloud Server
- CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected
- CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended
Sources
Also known as GHSA-qxf8-5jgm-xwxj.