CVE-2021-44912 Cross-site scripting in n/a
Attackers can upload HTML files to trigger stored XSS or PHP files for remote code execution if .htaccess restrictions are bypassed or misconfigured.
- 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-2021-44912?
CVE-2021-44912 is a medium-severity cross-site scripting vulnerability in n/a, published on 9 Feb 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
In XE 1.116, when uploading the Normal button, there is no restriction on the file suffix, which leads to any file uploading to the files directory. Since .htaccess only restricts the PHP type, uploading HTML-type files leads to stored XSS vulnerabilities. If the .htaccess configuration is improper, for example before the XE 1.11.2 version, you can upload the PHP type file to GETSHELL.
Weakness: CWE-79
Which versions are affected by CVE-2021-44912?
It affects 1 product.
Products include Xpressengine Xpressengine.
How do I fix CVE-2021-44912?
No fix has been published for CVE-2021-44912 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-2021-44912 being exploited?
There is no known exploitation of CVE-2021-44912 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-55vj-h525-w8cj.