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vuln-cve/data/2025/66xxx/CVE-2025-66622.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-66622",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2025-12-05T15:18:02.787Z",
"datePublished": "2025-12-09T02:07:18.831Z",
"dateUpdated": "2025-12-09T16:02:47.455Z"
},
"containers": {
"cna": {
"title": "matrix-sdk-base is vulnerable to DoS via custom m.room.join_rules event values",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-755",
"lang": "en",
"description": "CWE-755: Improper Handling of Exceptional Conditions",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "PASSIVE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 1.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3"
},
{
"name": "https://github.com/matrix-org/matrix-rust-sdk/pull/5924",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/matrix-org/matrix-rust-sdk/pull/5924"
},
{
"name": "https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0"
},
{
"name": "https://rustsec.org/advisories/RUSTSEC-2025-0135.html",
"tags": [
"x_refsource_MISC"
],
"url": "https://rustsec.org/advisories/RUSTSEC-2025-0135.html"
}
],
"affected": [
{
"vendor": "matrix-org",
"product": "matrix-rust-sdk",
"versions": [
{
"version": "< 0.16.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2025-12-09T02:07:18.831Z"
},
"descriptions": [
{
"lang": "en",
"value": "matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug. This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0."
}
],
"source": {
"advisory": "GHSA-jj6p-3m75-g2p3",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2025-12-09T14:16:11.253556Z",
"id": "CVE-2025-66622",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2025-12-09T16:02:47.455Z"
}
}
]
}
}