Medium

UBUNTU-CVE-2026-102586

Type: advisorySource: OSV1 source record

A flaw was found in Moodle. Insufficient sanitization of username input on the password reset page allows a remote attacker to conduct a cross-site scripting (XSS) attack. By convincing an unauthenticated user to access a specially crafted password reset link, an attacker could execute arbitrary script in the victim's browser.

Announced 30 Sept 2026Group revision 1

Original source ↗

UBUNTU-CVE-2026-102586

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-102586

moodle

Source reference: /affected/0/package/name

Affected versions: 2.7.9+dfsg-1
Source reference: /affected/0/versions
2.7.10+dfsg-1
Source reference: /affected/0/versions
2.7.11+dfsg-1
Source reference: /affected/0/versions
2.7.11+dfsg-2
Source reference: /affected/0/versions
2.7.12+dfsg-1
Source reference: /affected/0/versions
3.0.3+dfsg-0ubuntu1
Source reference: /affected/0/versions
3.0.3+dfsg-0ubuntu1+esm1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

moodle

Source reference: /affected/1/package/name

Affected versions: 3.0.3+dfsg-0ubuntu1
Source reference: /affected/1/versions
3.0.3+dfsg-0ubuntu1+esm1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "moodle",
      "purl": "pkg:deb/ubuntu/moodle?arch=source&distro=esm-apps-legacy%2Fxenial",
      "ecosystem": "Ubuntu:Pro:16.04:LTS"
    },
    "versions": [
      "2.7.9+dfsg-1",
      "2.7.10+dfsg-1",
      "2.7.11+dfsg-1",
      "2.7.11+dfsg-2",
      "2.7.12+dfsg-1",
      "3.0.3+dfsg-0ubuntu1",
      "3.0.3+dfsg-0ubuntu1+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102586.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "moodle",
          "binary_version": "3.0.3+dfsg-0ubuntu1+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "moodle",
      "purl": "pkg:deb/ubuntu/moodle?arch=source&distro=esm-apps%2Fbionic",
      "ecosystem": "Ubuntu:Pro:18.04:LTS"
    },
    "versions": [
      "3.0.3+dfsg-0ubuntu1",
      "3.0.3+dfsg-0ubuntu1+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102586.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "moodle",
          "binary_version": "3.0.3+dfsg-0ubuntu1+esm1"
        }
      ]
    }
  }
]

Related CVEs: CVE-2026-102586
Source reference: /upstream

Publisher severity

medium

Source reference: /severity/1/score

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-102586 · Medium

Event: #71359 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 22:46:09 GMT
Publisher date: Wed, 30 Sep 2026 09:17:00 GMT

Read the original announcement

Revision history

25 Oct 2026UBUNTU-CVE-2026-102586 · Revision 1Source updated