{
  "canonical_id": "symfony--CVE-2020-5274",
  "system_id": "symfony",
  "display_name": "Symfony",
  "category": "frameworks",
  "advisory_mode": "core",
  "title": "Exceptions displayed in non-debug configurations in Symfony",
  "summary": "Description\n-----------\n\nWhen `ErrorHandler` renders an exception HTML page, it uses un-escaped properties from the related Exception class to render the stacktrace. The security issue comes from the fact that the stacktraces were also displayed in non-`debug` environments.\n\nResolution\n----------\n\nThe `ErrorHandler` class now escapes all properties coming from the related Exception, and the stacktrace is not displayed anymore in non-`debug` environments.\n\nThe patches for this issue are available [here](https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad) and [here](https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db) for branch 4.4.\n\nCredits\n-------\n\nI would like to thank Luka Sikic for reporting & Yonel Ceruto and J\u00e9r\u00e9my Deruss\u00e9 for fixing the issue.",
  "published_at": "2020-03-30T20:09:31Z",
  "updated_at": "2026-03-13T22:15:59.230149Z",
  "severity": "low",
  "cvss_score": 3.1,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2",
  "secondary_source_urls": [
    "https://nvd.nist.gov/vuln/detail/CVE-2020-5274",
    "https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db",
    "https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad",
    "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/error-handler/CVE-2020-5274.yaml",
    "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5274.yaml",
    "https://symfony.com/cve-2020-5274"
  ],
  "aliases": [
    "BIT-symfony-2020-5274",
    "CVE-2020-5274",
    "GHSA-m884-279h-32v2"
  ],
  "cve_ids": [
    "CVE-2020-5274"
  ],
  "ghsa_ids": [
    "GHSA-m884-279h-32v2"
  ],
  "osv_ids": [
    "GHSA-m884-279h-32v2"
  ],
  "affected_versions": [
    "v4.4.0",
    "v4.4.1",
    "v4.4.2",
    "v4.4.3",
    "v5.0.0",
    "v5.0.1",
    "v5.0.2",
    "v5.0.3",
    "introduced=4.4.0, fixed<4.4.4",
    "introduced=5.0.0, fixed<5.0.4"
  ],
  "fixed_versions": [
    "4.4.4",
    "5.0.4"
  ],
  "package_name": "symfony/symfony",
  "render_markdown": true,
  "case_path": "07-framework-security/frameworks/symfony/cases/symfony-cve-2020-5274.md",
  "secure_code_topics": [
    "xss-output-encoding",
    "authz-server-side-recheck",
    "path-traversal-guard"
  ],
  "status": "generated",
  "triage_reasons": [],
  "verification_status": "triage-manual",
  "verification_mode": "synthetic",
  "last_verified_at": null,
  "last_run_id": null,
  "evidence_bundle": null,
  "historical_status": null,
  "latest_status": null,
  "browser_evidence": {
    "required": false,
    "present": false,
    "refs": []
  },
  "repro_profile_id": "xss-generic",
  "artifact_mode": "synthetic",
  "blocked_reason": null,
  "metadata": {
    "source_names": [
      "OSV Symfony"
    ],
    "source_kinds": [
      "osv-batch"
    ],
    "candidate_count": 1
  }
}