Element X Android allows the entity in control of the well-known file to break the confidentiality embedded Element Call

{
  "id": "e5443e1dca8a9b613b5badb6e2d5aee21b03b6718c6f9f572a1e75c2f4320dcf",
  "url": "https://osv.dev/vulnerability/CVE-2025-31127",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Element X Android allows the entity in control of the well-known file to break the confidentiality embedded Element Call",
    "summary": "Element X Android is a Matrix Android Client provided by element.io. In Element X Android versions between 0.4.16 and 25.03.3, the entity in control of the element.json well-known file is able, under certain conditions, to get access to the media encryption keys used for an Element Call call. This vulnerability is fixed in 25.03.4.",
    "evidence": "osv:CVE-2025-31127",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-31127",
      "aliases": [
        "CVE-2025-31127",
        "GHSA-x2g5-f28j-p7w6"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/element-hq/element-x-android",
              "type": "GIT",
              "events": [
                {
                  "introduced": "92dc7a307bfc6ed7559b660542fc7509ddd392be"
                },
                {
                  "fixed": "612749bbcc5f9e7258cd5887b939f2b44867a2c8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.4.16"
                      },
                      {
                        "fixed": "25.03.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "25.03.4"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v25.03.3",
            "v25.03.2",
            "v25.03.1",
            "v25.03.0",
            "v25.02.0",
            "v0.7.6",
            "v0.7.5",
            "v0.7.4",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.5",
            "v0.6.4",
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.16"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-31127.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.634893500Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/31xxx/CVE-2025-31127.json",
        "https://github.com/element-hq/element-x-android/security/advisories/GHSA-x2g5-f28j-p7w6",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-31127",
        "https://github.com/element-hq/element-meta/issues/2441"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/31xxx/CVE-2025-31127.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-31127",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519291,
  "published_at": "2025-04-03T17:54:22.695+00:00"
}