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cve.new
GHSA-f9m9-494r-w36pmedium

Moodle allows bypass of intended access restrictions

Check your stack

The advisory, in context

mod/chat/chat_ajax.php in Moodle through 2.3.11, 2.4.x before 2.4.9, 2.5.x before 2.5.5, and 2.6.x before 2.6.2 does not properly check for the mod/chat:chat capability during chat sessions, which allows remote authenticated users to bypass intended access restrictions in opportunistic circumstances by remaining in a chat session after an intra-session capability removal by an administrator.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Ecosystem versions

Earlier releases before 2.4.9

Fixed in 2.4.9

18 explicitly affected versions

v2.3.10, v2.3.11, v2.3.4, v2.3.5, v2.3.6, v2.3.7, v2.3.8, v2.3.9, v2.4.0, v2.4.0-rc1, v2.4.1, v2.4.2, v2.4.3, v2.4.4, v2.4.5, v2.4.6, v2.4.7, v2.4.8

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "0"
        },
        {
          "fixed": "2.4.9"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "v2.3.10",
    "v2.3.11",
    "v2.3.4",
    "v2.3.5",
    "v2.3.6",
    "v2.3.7",
    "v2.3.8",
    "v2.3.9",
    "v2.4.0",
    "v2.4.0-rc1",
    "v2.4.1",
    "v2.4.2",
    "v2.4.3",
    "v2.4.4",
    "v2.4.5",
    "v2.4.6",
    "v2.4.7",
    "v2.4.8"
  ]
}
Ecosystem versions

From 2.5.0 before 2.5.5

Fixed in 2.5.5

5 explicitly affected versions

v2.5.0, v2.5.1, v2.5.2, v2.5.3, v2.5.4

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "2.5.0"
        },
        {
          "fixed": "2.5.5"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "v2.5.0",
    "v2.5.1",
    "v2.5.2",
    "v2.5.3",
    "v2.5.4"
  ]
}
Ecosystem versions

From 2.6.0 before 2.6.2

Fixed in 2.6.2

2 explicitly affected versions

v2.6.0, v2.6.1

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "2.6.0"
        },
        {
          "fixed": "2.6.2"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "v2.6.0",
    "v2.6.1"
  ]
}

References