CVE-2026-63240 Information disclosure vulnerability
Authenticated learners can retrieve correct quiz answers from the course status endpoint, compromising assessment integrity in Koollab LMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63240?
CVE-2026-63240 is a medium-severity vulnerability in Three Learning Koollab LMS, published on 29 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An information disclosure vulnerability in Koollab LMS allowed an authenticated learner to obtain correct quiz answers from the course status endpoint without completing the assessment legitimately, compromising the integrity of assessments.
Weakness: CWE-200
Which versions are affected by CVE-2026-63240?
How do I fix CVE-2026-63240?
No fix has been published for CVE-2026-63240 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-63240 being exploited?
There is no known exploitation of CVE-2026-63240 in the wild and no public exploit code.
Sources
Also known as GHSA-9ch9-66pf-cjcf.