GHSA-qrfh-cc86-vc8c: Leantime/leantime Leantime Has HTML Injection Through Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qrfh-cc86-vc8c",
  "modified" : "2026-03-05T18:05:57Z",
  "published" : "2026-03-05T18:05:57Z",
  "aliases" : [ ],
  "summary" : "Leantime has HTML injection through firstname and lastname fields",
  "details" : "### Summary\nLeantime v2.3.27 is vulnerable to Stored HTML Injection. The `firstname` and `lastname` fields in the admin user edit page are rendered without  HTML escaping, allowing an authenticated user to inject arbitrary HTML that executes when the profile is viewed.\n\n### Vulnerable File\n`app/Domain/Users/Templates/editUser.tpl.php`\n\n### Vulnerable Code (Lines ~14-17)\n```php\nvalue=\"<?php echo $values['firstname'] ?>\"\nvalue=\"<?php echo $values['lastname'] ?>\"\n```\nThese fields output raw user input without sanitization.\n\n### Steps to Reproduce\n1. Login as admin > Go to Settings > Users > Edit any user\n2. Enter HTML payload in First Name or Last Name field:\n   `<h1>INJECTED</h1>`\n3. Save the user profile\n4. Create or view an article — the injected HTML renders in the author name\n\n### Fix\nReplace unescaped `echo` with `htmlspecialchars()`:\n```php\nvalue=\"<?php echo htmlspecialchars($values['firstname'], ENT_QUOTES, 'UTF-8') ?>\"\nvalue=\"<?php echo htmlspecialchars($values['lastname'], ENT_QUOTES, 'UTF-8') ?>\"\n```\nOr use the existing `$this->e()` helper already used in `editOwn.tpl.php`.\n\n### Impact\n- Stored HTML injection visible to all users viewing affected content\n- Can be used for phishing, fake login forms, and UI defacement\n- Affects all versions before 3.3.0",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "leantime/leantime"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.3.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Leantime/leantime/security/advisories/GHSA-qrfh-cc86-vc8c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Leantime/leantime/commit/3f8b2c6346111694bb18cec558b27c22d3a2b9d1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Leantime/leantime"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-05T18:05:57Z",
    "nvd_published_at" : null
  }
}