github - ghsa-cgvv-3455-824j

ghsa-cgvv-3455-824j

Vulnerability from github

Published

2025-06-24 21:30

Modified

2025-06-26 14:12

Severity ?

4.2 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Summary

Moodle Session Fixation allows unauthenticated users to hijack sessions via sesskey parameter

Details

A session fixation vulnerability in Moodle 3.x through 3.11.18 allows unauthenticated attackers to hijack user sessions via the sesskey parameter. The sesskey can be obtained without authentication and reused within the OAuth2 login flow, resulting in the victim's session being linked to the attacker's. Successful exploitation results in full account takeover. According to the Moodle Releases page, "Bug fixes for security issues in 3.11.x ended 11 December 2023." NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.11.18"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "moodle/moodle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "4.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-53021"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-384"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-26T14:12:34Z",
    "nvd_published_at": "2025-06-24T20:15:26Z",
    "severity": "MODERATE"
  },
  "details": "A session fixation vulnerability in Moodle 3.x through 3.11.18 allows unauthenticated attackers to hijack user sessions via the sesskey parameter. The sesskey can be obtained without authentication and reused within the OAuth2 login flow, resulting in the victim\u0027s session being linked to the attacker\u0027s. Successful exploitation results in full account takeover. According to the Moodle Releases page, \"Bug fixes for security issues in 3.11.x ended 11 December 2023.\" NOTE: This vulnerability only affects products that are no longer supported by the maintainer.",
  "id": "GHSA-cgvv-3455-824j",
  "modified": "2025-06-26T14:12:34Z",
  "published": "2025-06-24T21:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53021"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/moodle/moodle"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moodle/moodle/releases/tag/v3.11.18"
    },
    {
      "type": "WEB",
      "url": "https://moodledev.io/general/releases#moodle-311"
    },
    {
      "type": "WEB",
      "url": "https://rentry.co/moodle-oauth2-cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Moodle Session Fixation allows unauthenticated users to hijack sessions via sesskey parameter"
}

CVE-2025-53021 (GCVE-0-2025-53021)

Vulnerability from cvelistv5

Published

2025-06-24 00:00

Modified

2025-06-24 19:46

Severity ?

4.2 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE

CWE-384 - Session Fixation

Summary

References

▼	URL	Tags
	https://rentry.co/moodle-oauth2-cve
	https://github.com/moodle/moodle/releases/tag/v3.11.18
	https://moodledev.io/general/releases#moodle-311

Impacted products

	Vendor	Product	Version
	Moodle	Moodle	Version: 3 <

Show details on NVD website

JSON

To clipboard

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        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2025-53021",
                "options": [
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                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-24T19:46:30.849426Z",
                "version": "2.0.3"
              },
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    ],
    "cna": {
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          "vendor": "Moodle",
          "versions": [
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      "metrics": [
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          "cvssV3_1": {
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            "baseSeverity": "MEDIUM",
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        },
        {
          "url": "https://moodledev.io/general/releases#moodle-311"
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      ],
      "tags": [
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    "dateReserved": "2025-06-24T00:00:00.000Z",
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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