CVE-2020-26890

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. If such a malformed event is accepted into th...

Matrix Synapse Injection Vulnerability

Matrix Synapse is a Matrix Management Server implementation from the Matrix.org Foundation in the UK. A security vulnerability exists in Matrix Synapse versions prior to 1.20.0 that allows the use of non-standard NaN, Infinity, and -Infinity JSON values in the fields of the m.room.member event,...

[ASA-202011-4] matrix-synapse: cross-site scripting

Arch Linux Security Advisory ASA-202011-4 ========================================= Severity: High Date : 2020-11-03 CVE-ID : CVE-2020-26891 Package : matrix-synapse Type : cross-site scripting Remote : Yes Link : https://security.archlinux.org/AVG-1252 Summary ======= The package matrix-synapse...

DEBIAN-CVE-2020-26891

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

Design/Logic Flaw

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

CVE-2020-26891

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

PYSEC-2020-238

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

UBUNTU-CVE-2020-26891

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

CVE-2020-26891

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

CVE-2020-26891

CVE-2020-26891 affects Matrix Synapse prior to version 1.21.0. The vulnerability is an XSS flaw in AuthRestServlet caused by unsafe interpolation of the session GET parameter, which could allow an attacker to craft a malicious URL that triggers script execution on the Synapse-hosted domain via en...

CVE-2020-26891

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

CVE-2020-26891

AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the...

FreeBSD : py-matrix-synapse -- XSS vulnerability (5f39d80f-107c-11eb-8b47-641c67a117d8)

Matrix developers reports : The fallback authentication endpoint served via Synapse were vulnerable to cross-site scripting XSS attacks. The impact depends on the configuration of the domain that Synapse is deployed on, but may allow access to cookies and other browser data, CSRF vulnerabilities,...

py-matrix-synapse -- XSS vulnerability

Matrix developers reports: The fallback authentication endpoint served via Synapse were vulnerable to cross-site scripting XSS attacks. The impact depends on the configuration of the domain that Synapse is deployed on, but may allow access to cookies and other browser data, CSRF vulnerabilities,...

FreeBSD : py-matrix-synapse -- malformed events may prevent users from joining federated rooms (2327234d-fc4b-11ea-adef-641c67a117d8)

Affected Synapse versions assume that all events have an 'origin' field set. If an event without the 'origin' field is sent into a federated room, servers not already joined to the room will be unable to do so due to failing to fetch the malformed event. Impact : An attacker could cause a denial ...

FreeBSD : py-matrix-synapse -- multiple vulnerabilities (d9f686f3-fde0-48dc-ab0a-01c2fe3e0529)

Matrix developers report : Due to the two security issues highlighted below, server administrators are encouraged to update Synapse. We are not aware of these vulnerabilities being exploited in the wild. - A malicious homeserver could force Synapse to reset the state in a room to a small subset o...

FreeBSD : py-matrix-synapse -- users of single-sign-on are vulnerable to phishing (1afe9552-5ee3-11ea-9b6d-901b0e934d69)

Matrix developers report : The 1.11.1 release includes a security fix impacting installations using Single Sign-On i.e. SAML2 or CAS for authentication. Administrators of such installations are encouraged to upgrade as soon as possible. C Tenable Network Security, Inc. The descriptive text and...

py-matrix-synapse -- users of single-sign-on are vulnerable to phishing

Matrix developers report: The 1.11.1 release includes a security fix impacting installations using Single Sign-On i.e. SAML2 or CAS for authentication. Administrators of such installations are encouraged to upgrade as soon as possible...

FreeBSD : py-matrix-synapse -- multiple vulnerabilities (ed8cbad5-21a8-11ea-9b6d-901b0e934d69)

Matrix developers report : The synapse 1.7.1 release includes several security fixes as well as a fix to a bug exposed by the security fixes. All previous releases of Synapse are affected. Administrators are encouraged to upgrade as soon as possible. - Fix a bug which could cause room events to b...

py-matrix-synapse -- multiple vulnerabilities

Matrix developers report: The synapse 1.7.1 release includes several security fixes as well as a fix to a bug exposed by the security fixes. All previous releases of Synapse are affected. Administrators are encouraged to upgrade as soon as possible. Fix a bug which could cause room events to be...