NamelessMC Forum iframe width/height abuse causing UI-based Denial of Service

{
  "id": "d10990fd96c4b0f15483b53d1c4577981bd656d7bebf53ebe0ae01dfc449970a",
  "url": "https://osv.dev/vulnerability/CVE-2025-30158",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "NamelessMC Forum iframe width/height abuse causing UI-based Denial of Service",
    "summary": "NamelessMC is a free, easy to use & powerful website software for Minecraft servers. In version 2.1.4 and prior, the forum allows users to post iframe elements inside forum topics/comments/feed with no restriction on the iframe's width and height attributes. This allows an authenticated attacker to perform a UI-based denial of service (DoS) by injecting oversized iframes that block the forum UI and disrupt normal user interactions. This issue has been patched in version 2.2.0.",
    "evidence": "osv:CVE-2025-30158",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-30158",
      "aliases": [
        "CVE-2025-30158",
        "GHSA-2prx-rgr7-hq5f"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/namelessmc/nameless",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4726f43c3e637ca6c97a3bc813794311ef523ea6"
                },
                {
                  "fixed": "caa42a975338a13fbc1658e8c440108f16135643"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:namelessmc:nameless:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.2.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "caa42a975338a13fbc1658e8c440108f16135643"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4726f43c3e637ca6c97a3bc813794311ef523ea6"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.2.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v2.0.0-pr13",
            "v2.0.0-pr11",
            "v2.0.0-pr10",
            "v2.0.0-pr8",
            "v2.0.0-pr7",
            "v2.0.0-pr6",
            "v2.0.0-pr5",
            "v2.0.0-pr4",
            "v2.0.0-pr3",
            "v2.0.0-pr2",
            "v2.0.0-pr1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-30158.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.843286030Z",
      "provider": "osv",
      "references": [
        "https://github.com/NamelessMC/Nameless/releases/tag/v2.2.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30158.json",
        "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-2prx-rgr7-hq5f",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-30158",
        "https://github.com/NamelessMC/Nameless/commit/caa42a975338a13fbc1658e8c440108f16135643"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-400"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30158.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-30158",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510291,
  "published_at": "2025-04-18T15:50:49.309+00:00"
}