CVE-2021-39250 Cross-site scripting in n/a
Stored XSS in Invision Community allows attackers to execute code and take over admin accounts via malicious file uploads in user content.
- 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-2021-39250?
CVE-2021-39250 is a medium-severity cross-site scripting vulnerability in n/a, published on 17 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Invision Community (aka IPS Community Suite or IP-Board) before 4.6.5.1 allows stored XSS, with resultant code execution, because an uploaded file can be placed in an IFRAME element within user-generated content. For code execution, the attacker can rely on the ability of an admin to install widgets, disclosure of the admin session ID in a Referer header, and the ability of an admin to use the templating engine (e.g., Edit HTML).
Weakness: CWE-79
Which versions are affected by CVE-2021-39250?
It affects 1 product.
Products include Invisioncommunity Invision Power Board.
How do I fix CVE-2021-39250?
No fix has been published for CVE-2021-39250 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-2021-39250 being exploited?
There is no known exploitation of CVE-2021-39250 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-3p7x-m58j-fm72.