CVE-2021-21333
Vulnerability from cvelistv5
Published
2021-03-26 20:00
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
HTML injection in email and account expiry notifications
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
▼ | matrix-org | synapse |
Version: < 1.27.0 |
|
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Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email. The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker. This is fixed in version 1.27.0." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N", "version": "3.1" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-74", "description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2021-08-02T02:06:36", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M" }, "references": [ { "tags": [ "x_refsource_MISC" ], "url": "https://github.com/matrix-org/synapse/releases/tag/v1.27.0" }, { "tags": [ "x_refsource_MISC" ], "url": "https://github.com/matrix-org/synapse/pull/9200" }, { "tags": [ "x_refsource_MISC" ], "url": "https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df" }, { "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-c5f8-35qr-q4fm" }, { "name": "FEDORA-2021-a627cfd31e", "tags": [ "vendor-advisory", "x_refsource_FEDORA" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/" } ], "source": { "advisory": "GHSA-c5f8-35qr-q4fm", "discovery": "UNKNOWN" }, "title": "HTML injection in email and account expiry notifications", "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-21333", "STATE": "PUBLIC", "TITLE": "HTML injection in email and account expiry notifications" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "synapse", "version": { "version_data": [ { "version_value": "\u003c 1.27.0" } ] } } ] }, "vendor_name": "matrix-org" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). 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This is fixed in version 1.27.0." } ] }, "impact": { "cvss": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N", "version": "3.1" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)" } ] } ] }, "references": { "reference_data": [ { "name": "https://github.com/matrix-org/synapse/releases/tag/v1.27.0", "refsource": "MISC", "url": "https://github.com/matrix-org/synapse/releases/tag/v1.27.0" }, { "name": "https://github.com/matrix-org/synapse/pull/9200", "refsource": "MISC", "url": "https://github.com/matrix-org/synapse/pull/9200" }, { "name": "https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df", "refsource": "MISC", "url": "https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df" }, { "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-c5f8-35qr-q4fm", "refsource": "CONFIRM", "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-c5f8-35qr-q4fm" }, { "name": "FEDORA-2021-a627cfd31e", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/" } ] }, "source": { "advisory": "GHSA-c5f8-35qr-q4fm", "discovery": "UNKNOWN" } } } }, "cveMetadata": { "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-21333", "datePublished": "2021-03-26T20:00:19", "dateReserved": "2020-12-22T00:00:00", "dateUpdated": "2024-08-03T18:09:15.578Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-21333\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2021-03-26T20:15:11.953\",\"lastModified\":\"2023-11-07T03:29:49.350\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). 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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.