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Tenable Nessus
Tenable Nessus
added 2025/08/18 12:0 a.m.4 views

Linux Distros Unpatched Vulnerability : CVE-2021-21274

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In...

6.5CVSS6.7AI score0.02164EPSS
SaveExploits0References2
OSV
OSV
added 2021/02/26 6:15 p.m.25 views

CVE-2021-21274

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.25.0, a malicious homeserver could redirect requests to their .well-known file to a large file. This can lead t...

6.5CVSS6.4AI score
SaveExploits0References5
CVE
CVE
added 2021/02/26 5:25 p.m.118 views

CVE-2021-21274

CVE-2021-21274 affects Synapse (matrix-synapse) prior to version 1.25.0. A malicious homeserver could abuse .well-known redirection to a large file, causing denial of service by consuming significant resources on federated requests from untrusted servers. The issue is resolved in Synapse 1.25.0. ...

6.5CVSS5.4AI score0.02164EPSS
SaveExploits0References5Affected Software1
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