Vulnerability-Lookup

rustsec-2025-0041

Vulnerability from osv_rustsec

Published

2025-06-11 12:00

Modified

2025-06-12 09:17

Summary

matrix-sdk-crypto vulnerable to encrypted event sender spoofing by homeserver administrator

Details

matrix-sdk-crypto versions 0.8.0 up to and including 0.11.0 does not correctly validate the sender of an encrypted event. Accordingly, a malicious homeserver operator can modify events served to clients, making those events appear to the recipient as if they were sent by another user.

Although the CVSS score is 4.9 (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N), we consider this a High severity security issue.

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "matrix-sdk-crypto",
        "purl": "pkg:cargo/matrix-sdk-crypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.8.0"
            },
            {
              "fixed": "0.11.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2025-48937",
    "GHSA-x958-rvg6-956w"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "matrix-sdk-crypto versions 0.8.0 up to and including 0.11.0 does not correctly validate\nthe sender of an encrypted event. Accordingly, a malicious homeserver operator\ncan modify events served to clients, making those events appear to the recipient\nas if they were sent by another user.\n\nAlthough the CVSS score is 4.9 (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N), we\nconsider this a High severity security issue.",
  "id": "RUSTSEC-2025-0041",
  "modified": "2025-06-12T09:17:43Z",
  "published": "2025-06-11T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/matrix-sdk-crypto"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0041.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-x958-rvg6-956w"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "matrix-sdk-crypto vulnerable to encrypted event sender spoofing by homeserver administrator"
}

GHSA-X958-RVG6-956W

Vulnerability from github – Published: 2025-06-10 20:15 – Updated: 2025-06-12 21:23

Summary

matrix-sdk-crypto vulnerable to sender of encrypted events being spoofed by homeserver administrator

Details

Summary

matrix-sdk-crypto since version 0.8.0 up to 0.11.0 does not correctly validate the sender of an encrypted event. Accordingly, a malicious homeserver operator can modify events served to clients, making those events appear to the recipient as if they were sent by another user.

Although the CVSS score is 4.9 (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N), we consider this a High Severity security issue.

Details

The Matrix specification requires that clients ensure that "the event’s sender, room_id, and the recorded session_id match a trusted session". The vulnerable matrix-sdk-crypto versions check that the room_id matches that of the session denoted by session_id, but do not check the sender.

Patches

The issue is resolved by 13c1d20, included in versions 0.11.1 and 0.12.0 of matrix-sdk-crypto.

Workarounds

Since a successful attack requires administrator access to the homeserver, users who trust the administrators of their local homeserver are not affected.

References

https://spec.matrix.org/v1.14/client-server-api/#mmegolmv1aes-sha2

Severity ?

4.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "matrix-sdk-crypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.8.0"
            },
            {
              "fixed": "0.11.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-48937"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-290"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-10T20:15:37Z",
    "nvd_published_at": "2025-06-10T16:15:41Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nmatrix-sdk-crypto since version 0.8.0 up to 0.11.0 does not correctly validate the sender of an encrypted event. Accordingly, a malicious homeserver operator can modify events served to clients, making those events appear to the recipient as if they were sent by another user.\n\nAlthough the CVSS score is 4.9 (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N), we consider this a High Severity security issue.\n\n### Details\n\nThe Matrix specification [requires](https://spec.matrix.org/v1.14/client-server-api/#mmegolmv1aes-sha2) that clients ensure that \"the event\u2019s `sender`, `room_id`, and the recorded `session_id` match a trusted session\". The vulnerable matrix-sdk-crypto versions check that the `room_id` matches that of the session denoted by `session_id`, but do not check the `sender`.\n\n### Patches\n\nThe issue is resolved by [13c1d20](https://github.com/matrix-org/matrix-rust-sdk/commit/13c1d2048286bbabf5e7bc6b015aafee98f04d55), included in versions 0.11.1 and 0.12.0 of matrix-sdk-crypto.\n\n### Workarounds\n\nSince a successful attack requires administrator access to the homeserver, users who trust the administrators of their local homeserver are not affected.\n\n### References\n\n * https://spec.matrix.org/v1.14/client-server-api/#mmegolmv1aes-sha2",
  "id": "GHSA-x958-rvg6-956w",
  "modified": "2025-06-12T21:23:37Z",
  "published": "2025-06-10T20:15:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-x958-rvg6-956w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48937"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/commit/13c1d2048286bbabf5e7bc6b015aafee98f04d55"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/commit/56980745b4f27f7dc72ac296e6aa003e5d92a75b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/matrix-rust-sdk"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0041.html"
    },
    {
      "type": "WEB",
      "url": "https://spec.matrix.org/v1.14/client-server-api/#mmegolmv1aes-sha2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "matrix-sdk-crypto vulnerable to sender of encrypted events being spoofed by homeserver administrator"
}

CVE-2025-48937 (GCVE-0-2025-48937)

Vulnerability from cvelistv5 – Published: 2025-06-10 15:32 – Updated: 2025-06-10 15:46

Title

matrix-sdk-crypto vulnerable to sender of encrypted events being spoofed by homeserver administrator

Summary

matrix-rust-sdk is an implementation of a Matrix client-server library in Rust. matrix-sdk-crypto since version 0.8.0 and up to 0.11.0 does not correctly validate the sender of an encrypted event. Accordingly, a malicious homeserver operator can modify events served to clients, making those events appear to the recipient as if they were sent by another user. This vulnerability is fixed in 0.11.1 and 0.12.0.

Severity ?

4.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

GitHub_M

References

URL

Tags

	https://github.com/matrix-org/matrix-rust-sdk/sec…	x_refsource_CONFIRM
	https://github.com/matrix-org/matrix-rust-sdk/com…	x_refsource_MISC
	https://github.com/matrix-org/matrix-rust-sdk/com…	x_refsource_MISC
	https://spec.matrix.org/v1.14/client-server-api/#…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	matrix-org	matrix-rust-sdk	Affected: >= 0.8.0, < 0.11.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-48937",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-10T15:46:10.128770Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-10T15:46:22.358Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "matrix-rust-sdk",
          "vendor": "matrix-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.8.0, \u003c 0.11.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "matrix-rust-sdk is an implementation of a Matrix client-server library in Rust. matrix-sdk-crypto since version 0.8.0 and up to 0.11.0 does not correctly validate the sender of an encrypted event. Accordingly, a malicious homeserver operator can modify events served to clients, making those events appear to the recipient as if they were sent by another user. This vulnerability is fixed in 0.11.1 and 0.12.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-290",
              "description": "CWE-290: Authentication Bypass by Spoofing",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-10T15:32:00.822Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-x958-rvg6-956w",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-x958-rvg6-956w"
        },
        {
          "name": "https://github.com/matrix-org/matrix-rust-sdk/commit/13c1d2048286bbabf5e7bc6b015aafee98f04d55",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/matrix-org/matrix-rust-sdk/commit/13c1d2048286bbabf5e7bc6b015aafee98f04d55"
        },
        {
          "name": "https://github.com/matrix-org/matrix-rust-sdk/commit/56980745b4f27f7dc72ac296e6aa003e5d92a75b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/matrix-org/matrix-rust-sdk/commit/56980745b4f27f7dc72ac296e6aa003e5d92a75b"
        },
        {
          "name": "https://spec.matrix.org/v1.14/client-server-api/#mmegolmv1aes-sha2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://spec.matrix.org/v1.14/client-server-api/#mmegolmv1aes-sha2"
        }
      ],
      "source": {
        "advisory": "GHSA-x958-rvg6-956w",
        "discovery": "UNKNOWN"
      },
      "title": "matrix-sdk-crypto vulnerable to sender of encrypted events being spoofed by homeserver administrator"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-48937",
    "datePublished": "2025-06-10T15:32:00.822Z",
    "dateReserved": "2025-05-28T18:49:07.578Z",
    "dateUpdated": "2025-06-10T15:46:22.358Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

rustsec-2025-0041

Vulnerability from osv_rustsec

GHSA-X958-RVG6-956W

Summary

Details

Patches

Workarounds

References

CVE-2025-48937 (GCVE-0-2025-48937)

Tags

Sightings

Nomenclature