{"id":"EUVD-2025-201827","revision":null,"records":[{"revision":"4cd4afd05a3940d7af69e0a9175d45fe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-66622","aliases":[],"title":"matrix-sdk-base is vulnerable to DoS via custom m.room.join_rules event values","description":"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.","state":0,"publishedAt":"2025-12-09T02:07:18.831+00:00","modifiedAt":"2025-12-09T16:02:47.455+00:00","affected":[{"ecosystem":"Vendor product","name":"matrix-rust-sdk","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"matrix-org\",\n                    \"product\": \"matrix-rust-sdk\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.16.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":1.3,"severity":"LOW"}],"references":["https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3","https://github.com/matrix-org/matrix-rust-sdk/pull/5924","https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0","https://rustsec.org/advisories/RUSTSEC-2025-0135.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-66622","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-66622","identifiers":["CVE-2025-66622"]},"retained":false,"historicalAffected":[]},{"revision":"b5b9a5743aa84a7eb8e5aae11e49d06c","observedAt":"2026-11-09T04:09:34.06+00:00","statement":{"source":"euvd","id":"EUVD-2025-201827","aliases":["CVE-2025-66622","GHSA-jj6p-3m75-g2p3"],"title":"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 denia…","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"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","score":1.3,"severity":null}],"references":["https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3","https://github.com/matrix-org/matrix-rust-sdk/pull/5924","https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0","https://rustsec.org/advisories/RUSTSEC-2025-0135.html"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-201827","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Dec 9, 2025, 2:07:18 AM","dateUpdated":"Dec 9, 2025, 4:02:47 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2025-201827","identifiers":["EUVD-2025-201827","CVE-2025-66622","GHSA-jj6p-3m75-g2p3"]},"retained":false,"historicalAffected":[]},{"revision":"84d6a80e26444cf4b6057bf6b3aa702b","observedAt":"2026-10-25T03:17:36.152+00:00","statement":{"source":"nvd","id":"CVE-2025-66622","aliases":[],"title":"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 denia…","description":"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.","state":0,"publishedAt":"2025-12-09T16:18:21.747+00:00","modifiedAt":"2026-10-07T20:10:01.97+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":1.3,"severity":"LOW"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0","https://github.com/matrix-org/matrix-rust-sdk/pull/5924","https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3","https://rustsec.org/advisories/RUSTSEC-2025-0135.html"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66622","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-755"],"productCriteria":["cpe:2.3:a:matrix:matrix-rust-sdk:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2025-12-09T16:18:21.747","lastModified":"2026-10-07T20:10:01.970"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2025-66622","identifiers":["CVE-2025-66622"]},"retained":false,"historicalAffected":[]},{"revision":"cff74faf3f6247f1bcb648282c65ea23","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-jj6p-3m75-g2p3","aliases":["CVE-2025-66622","RUSTSEC-2025-0135"],"title":" matrix-sdk-base denial of service via custom m.room.join_rules event values","description":"The matrix-sdk-base crate is unable to handle responses that include custom m.room.join_rules values due to a serialization bug.\n\nThis 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.\n\n### Patches\nThe issue is fixed in matrix-sdk-base 0.16.0.\n\n### Workarounds\n\nUsers can leave affected rooms on another client to mitigate the issue.\n\n### References\n\nThe issue was fixed in https://github.com/matrix-org/matrix-rust-sdk/pull/5924.","state":0,"publishedAt":"2025-12-08T22:07:47+00:00","modifiedAt":"2025-12-09T19:36:28.271982+00:00","affected":[{"ecosystem":"crates.io","name":"matrix-sdk-base","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.16.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3","https://nvd.nist.gov/vuln/detail/CVE-2025-66622","https://github.com/matrix-org/matrix-rust-sdk/pull/5924","https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0","https://github.com/matrix-org/matrix-rust-sdk","https://rustsec.org/advisories/RUSTSEC-2025-0135.html"],"sourceUrl":"https://github.com/advisories/GHSA-jj6p-3m75-g2p3","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-jj6p-3m75-g2p3","identifiers":["GHSA-jj6p-3m75-g2p3","CVE-2025-66622","RUSTSEC-2025-0135"]},"retained":false,"historicalAffected":[]},{"revision":"2d879df0e1224ca19cc757e03a31f583","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"RUSTSEC-2025-0135","aliases":["CVE-2025-66622","GHSA-jj6p-3m75-g2p3"],"title":"matrix-sdk-base: Denial of service due to custom `m.room.join_rules` events","description":"The matrix-sdk-base crate is unable to handle responses that include custom\nm.room.join_rules values due to a serialization bug.\n\nThis can be exploited to cause a denial-of-service condition, if a user is\ninvited to a room with non-standard join rules, the crate's sync process will\nstall, preventing further processing for all rooms.","state":0,"publishedAt":"2025-12-08T12:00:00+00:00","modifiedAt":"2026-10-12T18:00:07.3551623+00:00","affected":[{"ecosystem":"crates.io","name":"matrix-sdk-base","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.0.0-0"},{"kind":"fixed","version":"0.16.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://crates.io/crates/matrix-sdk-base","https://rustsec.org/advisories/RUSTSEC-2025-0135.html","https://github.com/matrix-org/matrix-rust-sdk/pull/5924"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2025-0135","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2025-0135","identifiers":["RUSTSEC-2025-0135","CVE-2025-66622","GHSA-jj6p-3m75-g2p3"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-10T10:21:23.1769119+00:00","complete":true,"records":1773,"lastAttemptAt":"2026-11-10T10:21:23.1769119+00:00","lastSuccessAt":"2026-11-10T10:21:23.4268898+00:00","error":null,"lastVerifiedAt":"2026-11-10T10:21:23.4268987+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-8859cf40d4337e24bd2f258cc7778fbad01bb24c79d057aaf34cf1dfc6f8917d-8bdcdeeb414e06ff50ed637d818ac25d52680d19f71fc0ebe3f4c4b3f836ed38","complete":true,"records":421927,"lastAttemptAt":"2026-11-10T10:21:22.8157744+00:00","lastSuccessAt":"2026-11-10T09:21:38.1064889+00:00","error":null,"lastVerifiedAt":"2026-11-10T10:21:22.8157744+00:00","snapshotPublishedAt":"2026-11-10T09:20:43+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-2e6a476534094233b48f2f0b6da5cf35","complete":true,"records":13689,"lastAttemptAt":"2026-11-10T10:21:50.2500014+00:00","lastSuccessAt":"2026-11-10T06:05:35.03+00:00","error":null,"lastVerifiedAt":"2026-11-10T06:05:35.03+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13742,"expectedIdentifiers":13742,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-10T10:21:23.1769119+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-10T10:21:23.1769119+00:00","lastSuccessAt":"2026-11-10T10:21:23.4276529+00:00","error":null,"lastVerifiedAt":"2026-11-10T10:21:23.4276532+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-b0b0499af228434598651aa5d221386e","complete":false,"records":13695,"lastAttemptAt":"2026-11-10T10:21:49.6403901+00:00","lastSuccessAt":"2026-11-10T10:21:49.637+00:00","error":"100 identifier lookups failed; latest failures include request timeout. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-10T10:21:49.637+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13642,"expectedIdentifiers":13742,"failedIdentifiers":100},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-cdffb4589856378aa42e8d1bd4a6c74e27a180d8160bf764c44715ef760f0a62","complete":true,"records":9932,"lastAttemptAt":"2026-11-10T10:21:23.1241572+00:00","lastSuccessAt":"2026-11-10T00:04:19.8260565+00:00","error":null,"lastVerifiedAt":"2026-11-10T10:21:23.1241572+00:00","snapshotPublishedAt":"2026-11-09T23:48:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-26503967ae4379db8f374089589d6e03fb15bd31f820c9e992aaf93840c2236c","complete":true,"records":1971,"lastAttemptAt":"2026-11-10T10:21:22.8858542+00:00","lastSuccessAt":"2026-11-09T21:02:20.472473+00:00","error":null,"lastVerifiedAt":"2026-11-10T10:21:22.8858542+00:00","snapshotPublishedAt":"2026-11-09T20:18:18+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-94169eec81ea3989aa551092397ff34ae53c104b4a6ce646e1524452e4ab2a39","complete":true,"records":3065,"lastAttemptAt":"2026-11-10T10:21:23.1397622+00:00","lastSuccessAt":"2026-11-10T08:04:45.5923716+00:00","error":null,"lastVerifiedAt":"2026-11-10T10:21:23.1397622+00:00","snapshotPublishedAt":"2026-11-10T06:48:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-4331051b0b2d4ccdbdca3aa196b0be3818a465064a4b18dde4cf39c2250eb490","complete":true,"records":231599,"lastAttemptAt":"2026-11-10T10:21:23.0142877+00:00","lastSuccessAt":"2026-11-10T08:04:37.1757322+00:00","error":null,"lastVerifiedAt":"2026-11-10T10:21:23.0142877+00:00","snapshotPublishedAt":"2026-11-10T07:33:02+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}