Security advisory

{
  "id": "934b53f9be65fc6591a7075767ec8ecd27dd7b42d998e6142599e637752b6f4c",
  "url": "https://osv.dev/vulnerability/CVE-2021-33557",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-33557",
    "summary": "An XSS issue was discovered in manage_custom_field_edit_page.php in MantisBT before 2.25.2. Unescaped output of the return parameter allows an attacker to inject code into a hidden input field.",
    "evidence": "osv:CVE-2021-33557",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-33557",
      "aliases": [
        "CVE-2021-33557",
        "GHSA-52cx-vphc-jmjm"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mantisbt/mantisbt",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b5c333307a8bcf93268ae08232789598792381ba"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.25.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "release-2.25.1",
            "release-2.25.0",
            "release-2.24.0",
            "release-2.23.0",
            "release-2.22.0",
            "release-2.21.0",
            "release-2.20.0",
            "release-2.19.0",
            "release-2.18.0",
            "release-2.17.0",
            "release-2.16.0",
            "release-2.15.0",
            "release-2.14.0",
            "release-2.13.0",
            "release-2.12.0",
            "release-2.11.0",
            "release-2.10.0",
            "release-2.9.0",
            "release-2.8.0",
            "release-2.7.0",
            "release-2.6.0",
            "release-2.5.0",
            "release-2.4.0",
            "release-2.3.0",
            "release-2.2.0",
            "release-2.1.0",
            "release-2.0.0",
            "release-2.0.0-rc.2",
            "release-2.0.0-rc.1",
            "release-2.0.0-beta.3",
            "release-2.0.0-beta.2",
            "release-2.0.0-beta.1",
            "release-1.3.0-rc.2",
            "release-1.3.0-rc.1",
            "release-1.3.0-beta.3",
            "release-1.3.0-beta.2",
            "release-1.3.0-beta.1",
            "release-1.2.0rc1",
            "release-1.2.0a3",
            "release-1.2.0a2",
            "release-1.2.0a1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33557.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:21.558171643Z",
      "provider": "osv",
      "references": [
        "https://mantisbt.org/blog/archives/mantisbt/699",
        "https://mantisbt.org/bugs/view.php?id=28552"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-33557",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430508,
  "published_at": "2021-06-17T19:15:07.967+00:00"
}