Synapse 1.21.2 (2020-10-15) =========================== Debian packages and Docker images have been rebuilt using the latest versions of dependency libraries, including authlib 0.15.1. Please see bugfixes below. Security advisory ----------------- * HTML pages served via Synapse were vulnerable to cross-site scripting (XSS) attacks. All server administrators are encouraged to upgrade. ([\#8444](https://github.com/matrix-org/synapse/pull/8444)) ([CVE-2020-26891](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26891)) This fix was originally included in v1.21.0 but was missing a security advisory. This was reported by [Denis Kasak](https://github.com/dkasak). Bugfixes -------- - Fix rare bug where sending an event would fail due to a racey assertion. ([\#8530](https://github.com/matrix-org/synapse/issues/8530)) - An updated version of the authlib dependency is included in the Docker and Debian images to fix an issue using OpenID Connect. See [\#8534](https://github.com/matrix-org/synapse/issues/8534) for details.