Matrix
CVE-2018-10657
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAI
Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in pypi
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-20. Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018. Affected products include: Matrix Synapse. Version information: before 0.28.1.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
Matrix libolm before 3.2.3 allows a malicious Matrix homeserver to crash a client (while it is attempting to retrieve an
An issue was discovered in core/assets/form/form_question_types/form_question_type_file_upload/form_question_type_file_u
An issue was discovered in Squiz Matrix CMS 5.5.0 prior to 5.5.0.3, 5.5.1 prior to 5.5.1.8, 5.5.2 prior to 5.5.2.4, and
Unauthenticated remote attackers can coerce Conduit-derived Matrix homeservers into cryptographically signing arbitrary
matrix-appservice-irc is a Node.js IRC bridge for Matrix. Rated critical severity (CVSS 9.8), this vulnerability is remo
The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. Rated critical sever
Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Rated critical severity (CVSS 9.8), t
An issue was discovered in Matrix libolm through 3.2.16. Rated medium severity (CVSS 5.3), this vulnerability is remotel
An issue was discovered in Matrix libolm through 3.2.16. Rated medium severity (CVSS 5.3), this vulnerability is remotel
An issue was discovered in Squiz Matrix before 5.3.6.1 and 5.4.x before 5.4.1.3. Rated high severity (CVSS 8.8), this vu
matrix-hookshot is a Matrix bot for connecting to external services like GitHub, GitLab, JIRA, and more. Rated critical
matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Rated high severity (CVSS 8.8), this vulnerabilit
Exploit-DB