CVE-2023-45556 Cross-site scripting in n/a
A local attacker can execute arbitrary code via the theme Name parameter in MyBB Forums, requiring an upgrade to mitigate.
- 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
- Available
What is CVE-2023-45556?
CVE-2023-45556 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 6 Nov 2023. 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 vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.
Weakness: CWE-79
Which versions are affected by CVE-2023-45556?
1 open source package ship an affected version, including mybb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mybb Bitnami | All versions | 1.8.37 |
Products include Mybb Mybb.
How do I fix CVE-2023-45556?
Upgrade mybb to 1.8.37 or later.
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-2023-45556 being exploited?
There is no known exploitation of CVE-2023-45556 in the wild and no public exploit code.
Other vulnerabilities in Mybb Mybb
Sources
Also known as BIT-mybb-2023-45556.