GHSA-2wwr-9x6f-88gp: Easycorp/easyadmin bundle Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2wwr-9x6f-88gp",
  "modified" : "2026-07-01T18:18:46Z",
  "published" : "2026-07-01T18:18:46Z",
  "aliases" : [ ],
  "summary" : "EasyAdminBundle has path traversal and reflected XSS in Flag and Icon Twig components",
  "details" : "EasyAdminBundle ships two public Twig components — `<twig:ea:Flag countryCode=\"...\">` and `<twig:ea:Icon name=\"...\">` — that load SVG files from disk using a path built directly from a public component property, and then render the resulting markup with the Twig `|raw` filter.\n\nWhen an application binds either of those properties to data that is influenced by an end user, the lack of validation on the property value leads to two distinct issues:\n\n- Arbitrary `.svg` file disclosure (both components) — the property value is concatenated into a filesystem path without normalizing or constraining it, so `..` segments are preserved and resolved by PHP. Any file on the server whose absolute path ends in `.svg` (for example, user-uploaded SVG icons stored elsewhere on the host) can be read and embedded into the rendered page.\n- Reflected XSS in the admin UI (Flag component only) — when the requested flag file does not exist, the Flag component falls back to a hard-coded SVG string that interpolates the raw `countryCode` value twice, and the parent template renders that string with `|raw`. An attacker who controls `countryCode` can therefore inject arbitrary HTML/JavaScript that will execute inside the authenticated admin context that rendered the component.\n\nThe first-party usage shipped by EasyAdminBundle itself is not affected: the bundle only passes ISO 3166 alpha-2 codes validated through `Symfony\\Component\\Intl\\Countries` to the `Flag` component, and only hard-coded `internal:..` names or values previously set in PHP via `MenuItem::setIcon()` to the `Icon` component. The vulnerability is reachable only in third-party templates that pass attacker-controlled data into these properties.\n\n### Impact\n\nPath traversal is information disclosure bounded by the `.svg` extension; reflected XSS in Flag runs in the admin context and is therefore more sensitive but requires a vulnerable template wiring and user interaction.\n\n### Affected components\n\n- `EasyCorp\\Bundle\\EasyAdminBundle\\Twig\\Component\\Flag` — public Twig tag `<twig:ea:Flag>`, property `countryCode`.\n- `EasyCorp\\Bundle\\EasyAdminBundle\\Twig\\Component\\Icon` — public Twig tag `<twig:ea:Icon>`, property `name` when the value starts with the `internal:` prefix.\n\n### Credit\n\nEasyAdmin would like to thank Claude Mythos Preview (via Project Glasswing and The PHP Foundation) for reporting the issue and providing the fix.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "easycorp/easyadmin-bundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.29.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "easycorp/easyadmin-bundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0"
      }, {
        "fixed" : "5.0.10"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/EasyCorp/EasyAdminBundle/security/advisories/GHSA-2wwr-9x6f-88gp"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/EasyCorp/EasyAdminBundle"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-73", "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-01T18:18:46Z",
    "nvd_published_at" : null
  }
}