All the vulnerabilites related to matrix-org - synapse
cve-2021-21392
Vulnerability from cvelistv5
Published
2021-04-12 21:50
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
Open redirect via transitional IPv6 addresses on dual-stack networks
References
| ▼ | URL | Tags |
|---|---|---|
| https://pypi.org/project/matrix-synapse/ | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/security/advisories/GHSA-5wrh-4jwv-5w78 | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/pull/9240 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.28.0 |
|
|
|||
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cve-2021-39163
Vulnerability from cvelistv5
Published
2021-08-31 16:00
Modified
2024-08-04 01:58
Severity ?
EPSS score ?
Summary
Adding a private/unlisted room to a community exposes room metadata in an unauthorised manner.
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-jj53-8fmw-f2w2 | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/commit/cb35df940a | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/releases/tag/v1.41.1 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXT7ID7DNBRN2TVTETU3SYQHJKEG6PXN/ | vendor-advisory, x_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VHDEPCZ22GJFMZCWA2XZAGPOEV72POF/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.41.1 |
|
|
|||
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cve-2023-42453
Vulnerability from cvelistv5
Published
2023-09-26 20:49
Modified
2024-08-02 19:23
Severity ?
EPSS score ?
Summary
Improper validation of receipts allows forged read receipts in matrix synapse
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: >= 0.34.0, < 1.93.0 |
|
|
|||
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"value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room. This issue has been patched in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue."
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"url": "https://security.gentoo.org/glsa/202401-12"
}
],
"source": {
"advisory": "GHSA-7565-cq32-vx2x",
"discovery": "UNKNOWN"
},
"title": "Improper validation of receipts allows forged read receipts in matrix synapse "
}
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cve-2022-41952
Vulnerability from cvelistv5
Published
2022-11-22 00:00
Modified
2024-08-03 12:56
Severity ?
EPSS score ?
Summary
Uncontrolled Resource Consumption in Matrix Synapse
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.53.0 |
|
|
|||
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"url": "https://github.com/matrix-org/synapse/pull/11784"
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"url": "https://github.com/matrix-org/synapse/pull/11936"
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"descriptions": [
{
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"value": "Synapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after `max_spider_size` (default: 10M) bytes have been downloaded, which can in some cases lead to long-lived connections towards the streaming media server (for instance, Icecast). This can cause excessive traffic and connections toward such servers if their stream URL is, for example, posted to a large room with many Synapse instances with URL preview enabled. Version 1.52.0 implements a timeout mechanism which will terminate URL preview connections after 30 seconds. Since generating URL previews for media streams is not supported and always fails, 1.53.0 additionally implements an allow list for content types for which Synapse will even attempt to generate a URL preview. Upgrade to 1.53.0 to fully resolve the issue. As a workaround, turn off URL preview functionality by setting `url_preview_enabled: false` in the Synapse configuration file."
}
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cve-2022-31052
Vulnerability from cvelistv5
Published
2022-06-28 17:10
Modified
2024-08-03 07:03
Severity ?
EPSS score ?
Summary
URL previews can crash Synapse media repositories or Synapse monoliths
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-22p3-qrh9-cx32 | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/commit/fa1308061802ac7b7d20e954ba7372c5ac292333 | x_refsource_MISC | |
| https://spec.matrix.org/v1.2/client-server-api/#get_matrixmediav3preview_url | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EARKKJZ2W7WUITFDT4EG4NVATFYJQHF/ | vendor-advisory, x_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGSDQ4YAITCUACAB7SXQZDJIU3IQ4CJD/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.61.1 |
|
|
|||
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cve-2021-29471
Vulnerability from cvelistv5
Published
2021-05-11 15:05
Modified
2024-08-03 22:11
Severity ?
EPSS score ?
Summary
Denial of service in Matrix Synapse
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-x345-32rc-8h85 | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/commit/03318a766cac9f8b053db2214d9c332a977d226c | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/releases/tag/v1.33.2 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.33.2 |
|
|
|||
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cve-2021-41281
Vulnerability from cvelistv5
Published
2021-11-23 19:15
Modified
2024-08-04 03:08
Severity ?
EPSS score ?
Summary
Path traversal in Matrix Synapse
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-3hfw-x7gx-437c | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/commit/91f2bd090 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/releases/tag/v1.47.1 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N3WY56LCEZ4ZECLWV5KMAXF2PSMUB4F2/ | vendor-advisory, x_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EU7QRE55U4IUEDLKT5IYPWL3UXMELFAS/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.47.1 |
|
|
|||
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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
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/releases/tag/v1.27.0 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/9200 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/security/advisories/GHSA-c5f8-35qr-q4fm | x_refsource_CONFIRM | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.27.0 |
|
|
|||
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cve-2022-39335
Vulnerability from cvelistv5
Published
2023-05-26 13:36
Modified
2024-08-03 12:00
Severity ?
EPSS score ?
Summary
Synapse does not apply enough checks to servers requesting auth events of events in a room
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.69.0 |
|
|
|||
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cve-2021-39164
Vulnerability from cvelistv5
Published
2021-08-31 16:20
Modified
2024-08-04 01:58
Severity ?
EPSS score ?
Summary
Improper authorisation of /members discloses room membership to non-members
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/commit/cb35df940a | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/releases/tag/v1.41.1 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/security/advisories/GHSA-3x4c-pq33-4w3q | x_refsource_CONFIRM | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXT7ID7DNBRN2TVTETU3SYQHJKEG6PXN/ | vendor-advisory, x_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VHDEPCZ22GJFMZCWA2XZAGPOEV72POF/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.41.1 |
|
|
|||
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cve-2023-45129
Vulnerability from cvelistv5
Published
2023-10-10 17:17
Modified
2024-08-02 20:14
Severity ?
EPSS score ?
Summary
matrix-synapse vulnerable to denial of service due to malicious server ACL events
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.94.0 |
|
|
|||
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/"
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cve-2021-21274
Vulnerability from cvelistv5
Published
2021-02-26 17:25
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
Denial of service attack via .well-known lookups
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-2hwx-mjrm-v3g8 | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/releases/tag/v1.25.0 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/8950 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/commit/ff5c4da1289cb5e097902b3e55b771be342c29d6 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: >=0.99.0, < 1.25.0 |
|
|
|||
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cve-2021-21394
Vulnerability from cvelistv5
Published
2021-04-12 20:45
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
Denial of service (via resource exhaustion) due to improper input validation on third-party identifier endpoints
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-w9fg-xffh-p362 | x_refsource_CONFIRM | |
| https://pypi.org/project/matrix-synapse/ | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/9321 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/9393 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.28.0 |
|
|
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cve-2021-21393
Vulnerability from cvelistv5
Published
2021-04-12 21:35
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
Denial of service (via resource exhaustion) due to improper input validation on groups/communities endpoints
References
| ▼ | URL | Tags |
|---|---|---|
| https://pypi.org/project/matrix-synapse/ | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/9321 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/9393 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/security/advisories/GHSA-jrh7-mhhx-6h88 | x_refsource_CONFIRM | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.28.0 |
|
|
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cve-2020-26257
Vulnerability from cvelistv5
Published
2020-12-09 18:25
Modified
2024-08-04 15:56
Severity ?
EPSS score ?
Summary
Denial of service attack via incorrect parameters to federation APIs
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-hxmp-pqch-c8mm | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/pull/8776 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/commit/3ce2f303f15f6ac3dc352298972dc6e04d9b7a8b | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/blob/develop/CHANGES.md#synapse-1231-2020-12-09 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR4MMYZKX5N5GYGH4H5LBUUC5TLAFHI7/ | vendor-advisory, x_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DBTIU3ZNBFWZ56V4X7JIAD33V5H2GOMC/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.23.1 |
|
|
|||
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cve-2023-43796
Vulnerability from cvelistv5
Published
2023-10-31 16:52
Modified
2024-08-02 19:52
Severity ?
EPSS score ?
Summary
Synapse vulnerable to leak of remote user device information
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.95.1 |
|
|
|||
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cve-2021-21273
Vulnerability from cvelistv5
Published
2021-02-26 17:25
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
Open redirects on some federation and push requests
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/releases/tag/v1.25.0 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/security/advisories/GHSA-v936-j8gp-9q3p | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/pull/8821 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/commit/30fba6210834a4ecd91badf0c8f3eb278b72e746 | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.25.0 |
|
|
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{
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],
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"title": "Open redirects on some federation and push requests",
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cve-2023-41335
Vulnerability from cvelistv5
Published
2023-09-26 20:51
Modified
2024-08-02 19:01
Severity ?
EPSS score ?
Summary
Temporary storage of plaintext passwords during password changes in matrix synapse
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: >= 1.66.0, < 1.93.0 |
|
|
|||
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"url": "https://security.gentoo.org/glsa/202401-12"
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"title": "CVE Program Container"
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"vendor": "matrix-org",
"versions": [
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"lang": "en",
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],
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cve-2023-32683
Vulnerability from cvelistv5
Published
2023-06-06 18:24
Modified
2024-08-02 15:25
Severity ?
EPSS score ?
Summary
URL deny list bypass via oEmbed and image URLs when generating previews in Synapse
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.85.0 |
|
|
|||
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}
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},
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"tags": [
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{
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"source": {
"advisory": "GHSA-98px-6486-j7qc",
"discovery": "UNKNOWN"
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},
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},
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cve-2023-32682
Vulnerability from cvelistv5
Published
2023-06-06 18:20
Modified
2024-08-02 15:25
Severity ?
EPSS score ?
Summary
Improper checks for deactivated users during login in synapse
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.85.0 |
|
|
|||
{
"containers": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"references": [
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"x_transferred"
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"x_transferred"
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{
"name": "https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account",
"tags": [
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],
"url": "https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account"
},
{
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"tags": [
"x_refsource_MISC",
"x_transferred"
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},
{
"name": "https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config",
"tags": [
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"x_transferred"
],
"url": "https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config"
},
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"x_transferred"
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/"
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"vendor": "matrix-org",
"versions": [
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"descriptions": [
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}
],
"metrics": [
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
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],
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"tags": [
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"tags": [
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},
{
"name": "https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account",
"tags": [
"x_refsource_MISC"
],
"url": "https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account"
},
{
"name": "https://matrix-org.github.io/synapse/latest/jwt.html",
"tags": [
"x_refsource_MISC"
],
"url": "https://matrix-org.github.io/synapse/latest/jwt.html"
},
{
"name": "https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config",
"tags": [
"x_refsource_MISC"
],
"url": "https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/"
}
],
"source": {
"advisory": "GHSA-26c5-ppr8-f33p",
"discovery": "UNKNOWN"
},
"title": "Improper checks for deactivated users during login in synapse"
}
},
"cveMetadata": {
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cve-2021-21332
Vulnerability from cvelistv5
Published
2021-03-26 19:55
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
Cross-site scripting (XSS) vulnerability in the password reset endpoint
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-246w-56m2-5899 | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/releases/tag/v1.27.0 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/9200 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df | x_refsource_MISC | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/ | vendor-advisory, x_refsource_FEDORA |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.27.0 |
|
|
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cve-2022-31152
Vulnerability from cvelistv5
Published
2022-09-02 20:00
Modified
2024-08-03 07:11
Severity ?
EPSS score ?
Summary
Synapse vulnerable to denial of service (DoS) due to incorrect application of event authorization rules
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765 | x_refsource_CONFIRM | |
| https://github.com/matrix-org/synapse/pull/13087 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/pull/13088 | x_refsource_MISC | |
| https://github.com/matrix-org/synapse/releases/tag/v1.62.0 | x_refsource_MISC |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.62.0 |
|
|
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cve-2023-32323
Vulnerability from cvelistv5
Published
2023-05-26 13:32
Modified
2024-08-02 15:10
Severity ?
EPSS score ?
Summary
Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: < 1.74.0 |
|
|
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cve-2022-39374
Vulnerability from cvelistv5
Published
2023-05-26 13:44
Modified
2024-08-03 12:00
Severity ?
EPSS score ?
Summary
Synapse Denial of service due to incorrect application of event authorization rules during state resolution
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ▼ | matrix-org | synapse |
Version: >= 1.62.0, < 1.68.0 |
|
|
|||
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"value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0\n\n"
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"baseScore": 6.5,
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
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