CVE-2023-39777 Cross-site scripting in n/a
Attackers can execute arbitrary scripts in the vBulletin Admin Control Panel via a login URL parameter, potentially compromising administrator accounts.
- 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-2023-39777?
CVE-2023-39777 is a medium-severity cross-site scripting vulnerability in Vbulletin Vbulletin, published on 16 Sep 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
A cross-site scripting (XSS) vulnerability in the Admin Control Panel of vBulletin 5.7.5 and 6.0.0 allows attackers to execute arbitrary web scripts or HTML via the /login.php?do=login url parameter.
Weakness: CWE-79
Which versions are affected by CVE-2023-39777?
It affects 1 product.
Products include Vbulletin Vbulletin.
How do I fix CVE-2023-39777?
No fix has been published for CVE-2023-39777 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-2023-39777 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39777 exists.
Other vulnerabilities in Vbulletin Vbulletin
- CVE-2020-17496 vBulletin PHP Module Remote Code Execution
- CVE-2019-16759 vBulletin PHP Module Remote Code Execution
- CVE-2025-48827 vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running
- CVE-2023-25135 Deserialization in n/a
- CVE-2020-7373 Code injection in n/a
Sources
Also known as GHSA-8mfq-mqv3-25m4.