CVE-2021-22849 Hyweb HyCMS-J1 - Stored XSS
Authenticated users can inject JavaScript into the Hyweb HyCMS-J1 backend, enabling stored XSS attacks against other users.
- 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-2021-22849?
CVE-2021-22849 is a medium-severity cross-site scripting vulnerability in Hyweb HyCMS-J1, published on 22 Jan 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.
Weakness: CWE-79
Which versions are affected by CVE-2021-22849?
It affects 1 product.
Products include Hyweb Hycms-J1.
How do I fix CVE-2021-22849?
No fix has been published for CVE-2021-22849 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-2021-22849 being exploited?
There is no known exploitation of CVE-2021-22849 in the wild and no public exploit code.
Other vulnerabilities in Hyweb HyCMS-J1
Sources
Also known as GHSA-j57c-7v46-28f4.