CVE-2018-25248 MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php
Regular members can inject malicious scripts via download titles, executing them when administrators validate downloads, potentially leading to account takeover.
- 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-2018-25248?
CVE-2018-25248 is a medium-severity cross-site scripting vulnerability in MyBB Downloads Plugin, published on 4 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
MyBB Downloads Plugin 2.0.3 contains a persistent cross-site scripting vulnerability that allows regular members to inject malicious scripts through the download title field. Attackers can submit a new download with HTML/JavaScript code in the title parameter, which executes when administrators validate the download in downloads.php.
Weakness: CWE-79
Which versions are affected by CVE-2018-25248?
It affects 1 product.
Products include Mybb Mybb Downloads.
How do I fix CVE-2018-25248?
No fix has been published for CVE-2018-25248 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-2018-25248 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25248 exists.
Sources
Also known as GHSA-8mwv-4frr-pwqr.