{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"moderate"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2021-21333","title":"Title"},{"category":"description","text":"Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email. The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker. This is fixed in version 1.27.0.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2021-21333","url":"https://www.suse.com/security/cve/CVE-2021-21333"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1184872 for CVE-2021-21333","url":"https://bugzilla.suse.com/1184872"}],"title":"SUSE CVE CVE-2021-21333","tracking":{"current_release_date":"2025-02-17T05:46:52Z","generator":{"date":"2023-02-15T03:46:21Z","engine":{"name":"cve-database.git:bin/generate-csaf-vex.pl","version":"1"}},"id":"CVE-2021-21333","initial_release_date":"2023-02-15T03:46:21Z","revision_history":[{"date":"2023-02-15T03:46:21Z","number":"2","summary":"Current version"},{"date":"2025-01-01T04:46:17Z","number":"3","summary":"Current version"},{"date":"2025-02-15T05:20:44Z","number":"4","summary":"Current version"},{"date":"2025-02-17T05:46:52Z","number":"5","summary":"Current version"}],"status":"interim","version":"5"}}}