CVE-2021-3768 Cross-site Scripting (XSS) - Stored in bookstackapp/bookstack
Attackers can inject malicious scripts into BookStack pages, potentially stealing user sessions or executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3768?
CVE-2021-3768 is a medium-severity cross-site scripting vulnerability in bookstackapp/bookstack, published on 6 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Weakness: CWE-79
Which versions are affected by CVE-2021-3768?
It affects 1 product.
Products include Bookstackapp Bookstack.
How do I fix CVE-2021-3768?
No fix has been published for CVE-2021-3768 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-2021-3768 being exploited?
There is no known exploitation of CVE-2021-3768 in the wild and no public exploit code.
Other vulnerabilities in bookstackapp/bookstack
- CVE-2020-5256 Remote Code Execution Through Image Uploads in BookStack
- CVE-2020-26210 Cross-Site Scripting in BookStack
- CVE-2020-26211 Cross-Site Scripting in BookStack
- CVE-2022-0877 Cross-site Scripting (XSS) - Stored in bookstackapp/bookstack
- CVE-2021-3915 Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack
Sources
Also known as GHSA-mjrp-x8v8-f2mx.