Vulnerabilities > Matrix > Synapse > High
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2021-11-23 | CVE-2021-41281 | Path Traversal vulnerability in multiple products Synapse is a package for Matrix homeservers written in Python 3/Twisted. | 7.5 |
| 2021-03-26 | CVE-2021-21332 | Cross-site Scripting vulnerability in multiple products Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). | 8.2 |
| 2020-11-24 | CVE-2020-26890 | Improper Input Validation vulnerability in multiple products Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote attackers to execute a denial of service attack against the federation and common Matrix clients. | 7.5 |
| 2019-11-08 | CVE-2019-18835 | Insufficient Verification of Data Authenticity vulnerability in Matrix Synapse Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. | 7.5 |
| 2019-03-21 | CVE-2019-5885 | Use of Insufficiently Random Values vulnerability in multiple products Matrix Synapse before 0.34.0.1, when the macaroon_secret_key authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users. | 7.5 |
| 2018-09-18 | CVE-2018-16515 | Improper Verification of Cryptographic Signature vulnerability in multiple products Matrix Synapse before 0.33.3.1 allows remote attackers to spoof events and possibly have unspecified other impacts by leveraging improper transaction and event signature validation. | 8.8 |