CVE-2021-23838 Cross-site scripting in n/a
Reflected XSS in flatCore allows attackers to steal cookies and hijack sessions via the media_filter parameter in the admin interface.
- 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-2021-23838?
CVE-2021-23838 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Jan 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
An issue was discovered in flatCore before 2.0.0 build 139. A reflected XSS vulnerability was identified in the media_filter HTTP request body parameter for the acp interface. The affected parameter accepts malicious client-side script without proper input sanitization. For example, a malicious user can leverage this vulnerability to steal cookies from a victim user and perform a session-hijacking attack, which may then lead to unauthorized access to the site.
Weakness: CWE-79
Which versions are affected by CVE-2021-23838?
It affects 1 product.
Products include Flatcore Flatcore.
How do I fix CVE-2021-23838?
No fix has been published for CVE-2021-23838 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-2021-23838 being exploited?
There is no known exploitation of CVE-2021-23838 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-w58h-cm85-98cc.