{
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        "providerMetadata": {
          "dateUpdated": "2024-08-03T12:00:43.351Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76"
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          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-r48r-j8fx-mq2c"
          },
          {
            "name": "GLSA-202210-35",
            "tags": [
              "vendor-advisory",
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            ],
            "url": "https://security.gentoo.org/glsa/202210-35"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-39251",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2025-04-23T15:51:00.530252Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
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      "affected": [
        {
          "product": "matrix-js-sdk",
          "vendor": "matrix-org",
          "versions": [
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              "status": "affected",
              "version": "\u003c 19.7.0"
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          "lang": "en",
          "value": "Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. Additionally, a sophisticated attacker cooperating with a malicious homeserver could employ this vulnerability to perform a targeted attack in order to send fake to-device messages appearing to originate from another user. This can allow, for example, to inject the key backup secret during a self-verification, to make a targeted device start using a malicious key backup spoofed by the homeserver. These attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm. Starting with version 19.7.0, matrix-js-sdk has been modified to only accept Olm-encrypted to-device messages. Out of caution, several other checks have been audited or added. This attack requires coordination between a malicious home server and an attacker, so those who trust their home servers do not need a workaround."
        }
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        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
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        },
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              "description": "CWE-287: Improper Authentication",
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      ],
      "providerMetadata": {
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          "url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients"
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        {
          "url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-r48r-j8fx-mq2c"
        },
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          "name": "GLSA-202210-35",
          "tags": [
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          "url": "https://security.gentoo.org/glsa/202210-35"
        }
      ],
      "source": {
        "advisory": "GHSA-r48r-j8fx-mq2c",
        "discovery": "UNKNOWN"
      },
      "title": "Matrix Javascript SDK vulnerable to Olm/Megolm protocol confusion"
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2022-39251",
    "datePublished": "2022-09-28T00:00:00.000Z",
    "dateReserved": "2022-09-02T00:00:00.000Z",
    "dateUpdated": "2025-04-23T16:55:05.561Z",
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