CVE-2025-30355

CVE-2025-30355 affects the Synapse Matrix homeserver. A malicious server can craft events that cause Synapse up to v1.127.0 to fail federating with other servers. The root cause is an input validation issue in how events are processed (notably with a depth value outside the allowed range in Canon...

CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

CVE-2025-30355 Synapse vulnerable to federation denial of service via malformed events

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

CVE-2025-30355 Synapse vulnerable to federation denial of service via malformed events

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

CVE-2025-30355 Synapse vulnerable to federation denial of service via malformed events

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

Element Synapse 输入验证错误漏洞

Element Synapse is an open source Matrix Home Server implementation from Element Open Source. An input validation error vulnerability exists in Element Synapse version 1.127.0 and earlier, which stems from a malicious server that can prevent federation with other servers...

PT-2025-13021

Name of the Vulnerable Software and Affected Versions Synapse versions prior to 1.127.1 Description The issue allows a malicious server to craft events that prevent Synapse from federating with other servers. The vulnerability has been exploited in the wild. Recommendations For versions prior to...

py-matrix-synapse -- federation denial of service via malformed events

element-hq/synapse developers report: A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild...

VulnCheck KEV: CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

Malicious code in synapse-contracts (npm)

--- -= Per source details. Do not edit below this line.=- Source: ghsa-malware 2f22e2f65543683192030203ce08eecf0c137c3bc94f711cf9dd5c143dd1bd19 Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be...

MAL-2025-1564 Malicious code in synapse-contracts (npm)

--- -= Per source details. Do not edit below this line.=- Source: ghsa-malware 2f22e2f65543683192030203ce08eecf0c137c3bc94f711cf9dd5c143dd1bd19 Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be...

WSO2 API Manager SynapseArtifactUploaderAdmin Unrestricted File Upload Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on affected installations of WSO2 API Manager. Authentication is required to exploit this vulnerability. The specific flaw exists within the SynapseArtifactUploaderAdmin endpoint, which listens on TCP port 9443 by default. The...

FreeBSD : py-matrix-synapse -- multiple vulnerabilities in versions prior to 1.120.1 (71f3e9f0-bafc-11ef-885d-901b0e934d69)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 71f3e9f0-bafc-11ef-885d-901b0e934d69 advisory. element-hq/synapse developers report: The 1.120.1 release fixes multiple security...

[SECURITY] Fedora 41 Update: matrix-synapse-1.118.0-3.fc41

Matrix is an ambitious new ecosystem for open federated Instant Messaging and VoIP. Synapse is a reference "homeserver" implementation of Matrix from the core development team at matrix.org, written in Python/Twisted. It is intended to showcase the concept of Matrix and let folks see the spec in...

Fedora: Security Advisory (FEDORA-2024-995720f767)

The remote host is missing an update for the SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Fedora 40 : matrix-synapse (2024-995720f767)

The remote Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-995720f767 advisory. CVE-2024-52805, CVE-2024-52815, CVE-2024-53863 ---- Backport fixes from v1.120.1 Tenable has extracted the preceding description block directly from...

Fedora 41 : matrix-synapse (2024-4cadba7a29)

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-4cadba7a29 advisory. CVE-2024-52805, CVE-2024-52815, CVE-2024-53863, CVE-2024-53867 ---- Backport fixes from v1.120.1 Tenable has extracted the preceding description blo...

Sensitive Information Exposure

Matrix-synapse is vulnerable to information disclosure. The vulnerability is due to improper handling of Sliding Sync, which can leak partial room state changes to users who are no longer in a room, while non-state events remain unaffected...

Improper Input Validation

Synapse is vulnerable to Improper Input Validation. The vulnerability is due to improper validation of invites received over federation, allowing a malicious server to send crafted invites that disrupt the affected user's ability to perform /sync operations...