CVE-2019-12830 Cross-site scripting in n/a
An attacker can exploit a parsing flaw in the Private Message renderer to execute persistent XSS and take over any forum account.
- 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-2019-12830?
CVE-2019-12830 is a high-severity cross-site scripting vulnerability in Mybb Mybb, published on 15 Jun 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCode issue.
Weakness: CWE-79
Which versions are affected by CVE-2019-12830?
It affects 1 product.
Products include Mybb Mybb.
How do I fix CVE-2019-12830?
No fix has been published for CVE-2019-12830 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-2019-12830 being exploited?
There is no known exploitation of CVE-2019-12830 in the wild and no public exploit code.
Other vulnerabilities in Mybb Mybb
Sources
Also known as GHSA-h3wx-4w3j-grr9.