CVE-2020-19049 Cross-site scripting in n/a
Remote attackers can inject arbitrary web script or HTML via the forum description field in MyBB, potentially leading to session hijacking or malicious actions.
- 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-2020-19049?
CVE-2020-19049 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 31 Aug 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
Cross Site Scripting (XSS) in MyBB v1.8.20 allows remote attackers to inject arbitrary web script or HTML via the "Description" field found in the "Add New Forum" page by doing an authenticated POST HTTP request to '/Upload/admin/index.php?module=forum-management&action=add'.
Weakness: CWE-79
Which versions are affected by CVE-2020-19049?
1 open source package ship an affected version, including mybb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mybb Bitnami | From 1.8.20 to 1.8.20 | None |
Products include Mybb Mybb.
How do I fix CVE-2020-19049?
No fix has been published for CVE-2020-19049 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-2020-19049 being exploited?
There is no known exploitation of CVE-2020-19049 in the wild and no public exploit code.
Other vulnerabilities in Mybb Mybb
Sources
Also known as BIT-mybb-2020-19049, GHSA-x5c3-9c32-978j.