CVE-2021-42940 Cross-site scripting in n/a
An attacker can execute arbitrary JavaScript in the victim's browser by uploading a malicious SVG file to the attachment handler.
- 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-2021-42940?
CVE-2021-42940 is a critical cross-site scripting vulnerability in n/a, published on 11 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A Cross Site Scripting (XSS) vulnerability exists in Projeqtor 9.3.1 via /projeqtor/tool/saveAttachment.php, which allows an attacker to upload a SVG file containing malicious JavaScript code.
Weakness: CWE-79
Which versions are affected by CVE-2021-42940?
It affects 1 product.
Products include Projeqtor Projeqtor.
How do I fix CVE-2021-42940?
No fix has been published for CVE-2021-42940 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-2021-42940 being exploited?
There is no known exploitation of CVE-2021-42940 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-qjr7-64vh-gjxw.