CVE-2026-63235: Vulnerability in Three Learning Koollab LMS
An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to forcibly terminate the session of any user given their email address via the login kickout endpoint, resulting in a denial of service.
AI Analysis
Technical Summary
CVE-2026-63235 is an improper access control vulnerability in Three Learning's Koollab LMS product, specifically version 5.3.2. It permits an unauthenticated attacker to forcibly terminate active sessions of users by supplying their email address to the login kickout endpoint. This leads to denial of service by disrupting user sessions. There is no indication of data leakage or modification. No official patch or remediation level has been provided by the vendor as of the publication date.
Potential Impact
The vulnerability impacts availability by allowing attackers to disrupt user sessions, causing denial of service. There is no impact on confidentiality or integrity. The low CVSS score reflects the limited scope of the impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, users should monitor vendor communications for updates. Until a fix is available, consider restricting access to the login kickout endpoint if possible or implementing additional access controls to prevent unauthenticated abuse.
CVE-2026-63235: Vulnerability in Three Learning Koollab LMS
Description
An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to forcibly terminate the session of any user given their email address via the login kickout endpoint, resulting in a denial of service.
CVSS v3.1
Score 3.7low
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-63235 is an improper access control vulnerability in Three Learning's Koollab LMS product, specifically version 5.3.2. It permits an unauthenticated attacker to forcibly terminate active sessions of users by supplying their email address to the login kickout endpoint. This leads to denial of service by disrupting user sessions. There is no indication of data leakage or modification. No official patch or remediation level has been provided by the vendor as of the publication date.
Potential Impact
The vulnerability impacts availability by allowing attackers to disrupt user sessions, causing denial of service. There is no impact on confidentiality or integrity. The low CVSS score reflects the limited scope of the impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, users should monitor vendor communications for updates. Until a fix is available, consider restricting access to the login kickout endpoint if possible or implementing additional access controls to prevent unauthenticated abuse.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CSA
- Date Reserved
- 2026-07-16T02:33:02.674Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a699fbb9c2644c7f814eb5a
Added to database: 07/29/2026, 06:37:47 UTC
Last enriched: 07/29/2026, 11:39:07 UTC
Last updated: 07/30/2026, 00:22:41 UTC
Views: 12
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