CVE-2016-9421 Cross-site scripting in n/a
Remote attackers can inject arbitrary web script or HTML into the MyBB admin control panel, potentially compromising administrator accounts.
- 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-2016-9421?
CVE-2016-9421 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 31 Jan 2017. 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
Cross-site scripting (XSS) vulnerability in the Users module in the Admin control panel in MyBB (aka MyBulletinBoard) before 1.8.8 and MyBB Merge System before 1.8.8 might allow remote attackers to inject arbitrary web script or HTML via unspecified vectors.
Weakness: CWE-79
Which versions are affected by CVE-2016-9421?
It affects 2 products.
Products include Mybb Merge System, Mybb Mybb.
How do I fix CVE-2016-9421?
No fix has been published for CVE-2016-9421 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-2016-9421 being exploited?
There is no known exploitation of CVE-2016-9421 in the wild and no public exploit code.
Other vulnerabilities in Mybb Mybb
Sources
Also known as GHSA-9cgj-rhjc-pjpc.