VULNERABILITY INTELLIGENCE
CVE-2026-56877
CVSS score6.3 MEDIUM
EPSS probability0.39%
CISA KEVNot currently listed
Published2026-07-13
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Description
The SCORM lab launch endpoint in Skillable (scorm.skillable.com) through 2026-07-13 does not validate the client-supplied userId parameter against the authenticated SCORM session token. An authenticated user can substitute arbitrary userId values to bypass per-user lab launch rate limits and consume other users' lab allocations, resulting in denial of service against targeted users' lab and exam access. Skillable was formerly named Learn on Demand Systems.
Weakness classification
- CWE-472: External Control of Assumed-Immutable Web Parameter