CVE-2021-42841 Cross-site scripting in n/a
Remote attackers can execute scripts via crafted URLs to steal cookie-based authentication credentials in Insta HMS.
- 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-2021-42841?
CVE-2021-42841 is a medium-severity cross-site scripting vulnerability in n/a, published on 6 Jan 2022. 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
Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied input by multiple scripts. A remote attacker could exploit this vulnerability via a crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.
Weakness: CWE-79
Which versions are affected by CVE-2021-42841?
It affects 1 product.
Products include Practo Insta Hms.
How do I fix CVE-2021-42841?
No fix has been published for CVE-2021-42841 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-2021-42841 being exploited?
There is no known exploitation of CVE-2021-42841 in the wild and no public exploit code.
Sources
Also known as GHSA-p7q5-gpw3-mqfx.