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CVSS: 5.4EPSS: 0%CPEs: 1EXPL: 0

Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled` configuration setting. 2. The local password database is enabled via the `password_config.enabled` and `password_config.localdb_enabled` configuration settings *and* a user's password is updated via an admin API after a user is deactivated. • https://github.com/matrix-org/synapse/pull/15624 https://github.com/matrix-org/synapse/pull/15634 https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2 https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account https://matrix-org.github.io/synapse/latest/jwt.html https://matrix-org.github.io/synapse/latest/usage& • CWE-287: Improper Authentication •

CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0 Synapse es un servidor doméstico Matrix de código abierto escrito y mantenido por la Fundación Matrix.org. Si Synapse y un servidor doméstico malicioso están unidos a la misma habitación, el servidor doméstico malicioso puede engañar a Synapse para que acepte eventos previamente rechazados en su vista del estado actual de esa sala. • https://github.com/matrix-org/synapse/pull/13723 https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD • CWE-400: Uncontrolled Resource Consumption •

CVSS: 5.0EPSS: 0%CPEs: 1EXPL: 0

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix Federation API allows remote homeservers to request the authorization events in a room. This is necessary so that a homeserver receiving some events can validate that those events are legitimate and permitted in their room. However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorization events does not sufficiently check that the requesting server should be able to access them. The issue was patched in Synapse 1.69.0. • https://github.com/matrix-org/synapse/issues/13288 https://github.com/matrix-org/synapse/pull/13823 https://github.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwv https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-862: Missing Authorization •

CVSS: 5.0EPSS: 0%CPEs: 1EXPL: 1

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of `invite_room_state`, meaning that it was possible to create an arbitrarily large invite event. Synapse 1.74 refuses to create oversized `invite_room_state` fields. • https://github.com/matrix-org/synapse/issues/14492 https://github.com/matrix-org/synapse/pull/14642 https://github.com/matrix-org/synapse/security/advisories/GHSA-f3wc-3vxv-xmvr https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD • CWE-20: Improper Input Validation •

CVSS: 5.4EPSS: 0%CPEs: 1EXPL: 0

matrix-react-sdk is a react-based SDK for inserting a Matrix chat/VoIP client into a web page. Prior to version 3.71.0, plain text messages containing HTML tags are rendered as HTML in the search results. To exploit this, an attacker needs to trick a user into searching for a specific message containing an HTML injection payload. No cross-site scripting attack is possible due to the hardcoded content security policy. Version 3.71.0 of the SDK patches over the issue. • https://github.com/matrix-org/matrix-react-sdk/commit/bf182bc94556849d7acdfa0e5fdea2aa129ea826 https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.71.0 https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-xv83-x443-7rmw • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') •