CVE-2026-63235
Improper access control vulnerability
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.
INFO
Published Date :
July 29, 2026, 7:16 a.m.
Last Modified :
Oct. 23, 2026, 11:10 p.m.
Remotely Exploit :
Yes !
Source :
5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
Affected Products
The following products are affected by CVE-2026-63235
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | LOW | 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4 | ||||
| CVSS 3.1 | LOW | MITRE-CVE |
Solution
- Enforce authentication for session termination endpoint.
- Validate user privileges before terminating sessions.
- Implement proper access controls for user management.
- Review and update session management logic.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63235.
| URL | Resource |
|---|---|
| https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63235 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63235
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63235 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63235 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: Koollab LMS de Three Learning, Description: Una vulnerabilidad de control de acceso inadecuado en Koollab LMS permitió a un atacante no autenticado terminar forzosamente la sesión de cualquier usuario dada su dirección de correo electrónico a través del endpoint de expulsión de inicio de sesión, lo que resultó en una denegación de servicio. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 29, 2026
Action Type Old Value New Value Added CWE CWE-284 Added SSVC {'id': 'CVE-2026-63235', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-29T14:31:18.454962Z'} -
New CVE Received by 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
Jul. 29, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Three Learning', 'product': 'Koollab LMS', 'versions': [{'status': 'affected', 'version': '5.3.2'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Added Reference https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/