CVE-2026-3007 Stored Cross-Site Scripting (XSS) Vulnerability
Attackers can inject malicious scripts into the Koollab LMS courselet feature, potentially compromising user 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-2026-3007?
CVE-2026-3007 is a medium-severity cross-site scripting vulnerability in Three Learning Koollab Learning Management System, published on 23 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
Successful exploitation of the stored cross-site scripting (XSS) vulnerability could allow an attacker to execute arbitrary JavaScript on any user account that has access to Koollab LMS’ courselet feature.
Weakness: CWE-79
Which versions are affected by CVE-2026-3007?
How do I fix CVE-2026-3007?
No fix has been published for CVE-2026-3007 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-2026-3007 being exploited?
There is no known exploitation of CVE-2026-3007 in the wild and no public exploit code.
Sources
Also known as GHSA-p88x-88cf-mv94.