CVE-2021-20103 Cross-site scripting in AppNitro Machform
Stored XSS in Machform allows attackers to inject malicious scripts via file attachments, potentially leading to session hijacking or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-20103?
CVE-2021-20103 is a medium-severity cross-site scripting vulnerability in AppNitro Machform, published on 29 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Machform prior to version 16 is vulnerable to stored cross-site scripting due to insufficient sanitization of file attachments uploaded with forms through upload.php.
Weakness: CWE-79
Which versions are affected by CVE-2021-20103?
It affects 1 product.
Products include Machform Machform.
How do I fix CVE-2021-20103?
No fix has been published for CVE-2021-20103 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-2021-20103 being exploited?
There is no known exploitation of CVE-2021-20103 in the wild and no public exploit code.
Other vulnerabilities in AppNitro Machform
Sources
Also known as GHSA-89p7-qxqf-9q7p.