Vulnerability-Lookup

GHSA-8J44-5653-Q846

Vulnerability from github – Published: 2026-07-29 09:31 – Updated: 2026-07-29 09:31

Details

A TOTP two-factor authentication bypass vulnerability in Koollab LMS allowed an attacker to supply a client-controlled seed to generate a matching one-time password and bypass the second authentication factor, potentially enabling unauthorised access to administrator accounts.

Severity

4.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

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  "affected": [],
  "aliases": [
    "CVE-2026-63237"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-29T07:16:43Z",
    "severity": "MODERATE"
  },
  "details": "A TOTP two-factor authentication bypass vulnerability in\nKoollab LMS allowed an\nattacker to supply a client-controlled seed to generate a matching one-time\npassword and bypass the second authentication factor, potentially enabling\nunauthorised access to administrator accounts.",
  "id": "GHSA-8j44-5653-q846",
  "modified": "2026-07-29T09:31:27Z",
  "published": "2026-07-29T09:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63237"
    },
    {
      "type": "WEB",
      "url": "https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094"
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-63237 (GCVE-0-2026-63237)

Vulnerability from cvelistv5 – Published: 2026-07-29 06:25 – Updated: 2026-07-29 14:29

Title

TOTP two-factor authentication bypass vulnerability

Summary

Severity

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

CSA

References

1 reference

URL	Tags
https://www.csa.gov.sg/alerts-and-advisories/aler…

Impacted products

1 product

Vendor	Product	Version
Three Learning	Koollab LMS	Affected: 5.3.2

Date Public

2026-07-29 06:07

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-8J44-5653-Q846

CVE-2026-63237 (GCVE-0-2026-63237)

Tags

Sightings

Nomenclature