Vulnerability-Lookup

CVE-2026-64961 (GCVE-0-2026-64961)

Vulnerability from cvelistv5 – Published: 2026-08-20 13:57 – Updated: 2026-08-20 15:26 X_Open Source Unsupported When Assigned

Title

Authentication Bypass in ATutor

Summary

ATutor is vulnerable to authentication bypass . Although a token validation check is present in the auto-login functionality, the values required for token validation remain uninitialized in certain code paths. An unauthenticated attacker who can determine a user's identifier and registration timestamp can generate a valid token and authenticate as an existing user, including administrator, without knowing the password. Product is no longer actively supported and the vulnerabilities have not been fixed. Only version 2.2.4 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 14:58 UTC

CWE

CWE-639 - Authorization bypass through User-Controlled key

Assigner

CERT-PL ENISA root

References

2 references

URL	Tags
https://cert.pl/en/posts/2026/08/CVE-2026-64960	third-party-advisory
https://atutor.github.io/	product

Impacted products

1 product

Vendor	Product	Version	CPE status
ATutor	ATutor	Affected: 2.2.4 (semver)	guessed

Credits

Michał Majchrowicz (AFINE Team) Marcin Wyczechowski (AFINE Team)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-64961

Vulnerability from fkie_nvd - Published: 2026-08-20 14:17 - Updated: 2026-08-20 16:17

Severity

6.3 (Medium) - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	cvd@cert.pl	https://atutor.github.io/
	cvd@cert.pl	https://cert.pl/en/posts/2026/08/CVE-2026-64960

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "defaultStatus": "unknown",
          "product": "ATutor",
          "repo": "https://github.com/atutor/ATutor",
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  "id": "CVE-2026-64961",
  "lastModified": "2026-08-20T16:17:32.387",
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GHSA-XH7M-R4HC-CM86

Vulnerability from github – Published: 2026-08-20 15:34 – Updated: 2026-08-20 15:34

Details

Product is no longer actively supported and the vulnerabilities have not been fixed. Only version 2.2.4 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.

Severity

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-64961"
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    "github_reviewed": false,
    "github_reviewed_at": null,
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  },
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  "id": "GHSA-xh7m-r4hc-cm86",
  "modified": "2026-08-20T15:34:17Z",
  "published": "2026-08-20T15:34:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64961"
    },
    {
      "type": "WEB",
      "url": "https://atutor.github.io"
    },
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      "type": "WEB",
      "url": "https://cert.pl/en/posts/2026/08/CVE-2026-64960"
    }
  ],
  "schema_version": "1.4.0",
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      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-64961 (GCVE-0-2026-64961)

FKIE_CVE-2026-64961

GHSA-XH7M-R4HC-CM86

Tags

Sightings

Nomenclature