CVE-2026-63234

criticalCVSS 9.9covered by 1 sourcefirst seen 2026-07-29

A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticated attacker to inject through the manual mark assessment endpoint, control data passed to unserialize(), write a webshell to a publicly accessible location, and execute arbitrary code on the server.

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Exploitation outlook

Low exploitation risk0.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-63234: A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticat…nvd · 2026-07-29

External references

NVD record for CVE-2026-63234

CVE.org record

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