# 1.8.14 ### Security fixes * Fixed a persistent XSS vulnerability in the Chat component. In case you can't update to 1.8.14 directly, we strongly recommend to cherry-pick a7968115581e20ef47a533e030f59f830486bdfa. Thanks to sonarsource for the professional disclosure. ### Compatibility changes * Node.js v12.13.0 or later is now required. * The `favicon` setting is now interpreted as a pathname to a favicon file, not a URL. Please see the documentation comment in `settings.json.template`. * The undocumented `faviconPad` and `faviconTimeslider` settings have been removed. * MySQL/MariaDB now uses connection pooling, which means you will see up to 10 connections to the MySQL/MariaDB server (by default) instead of 1. This might cause Etherpad to crash with a "ER_CON_COUNT_ERROR: Too many connections" error if your server is configured with a low connection limit. * Changes to environment variable substitution in `settings.json` (see the documentation comments in `settings.json.template` for details): * An environment variable set to the string "null" now becomes `null` instead of the string "null". Similarly, if the environment variable is unset and the default value is "null" (e.g., `"${UNSET_VAR:null}"`), the value now becomes `null` instead of the string "null". It is no longer possible to produce the string "null" via environment variable substitution. * An environment variable set to the string "undefined" now causes the setting to be removed instead of set to the string "undefined". Similarly, if the environment variable is unset and the default value is "undefined" (e.g., `"${UNSET_VAR:undefined}"`), the setting is now removed instead of set to the string "undefined". It is no longer possible to produce the string "undefined" via environment variable substitution. * Support for unset variables without a default value is now deprecated. Please change all instances of `"${FOO}"` in your `settings.json` to `${FOO:null}` to keep the current behavior. * The `DB_*` variable substitutions in `settings.json.docker` that previously defaulted to `null` now default to "undefined". * Calling `next` without argument when using `Changeset.opIterator` does always return a new Op. See b9753dcc7156d8471a5aa5b6c9b85af47f630aa8 for details. ### Notable enhancements and fixes * MySQL/MariaDB now uses connection pooling, which should improve stability and reduce latency. * Bulk database writes are now retried individually on write failure. * Minify: Avoid crash due to unhandled Promise rejection if stat fails. * padIds are now included in /socket.io query string, e.g. `https://video.etherpad.com/socket.io/?padId=AWESOME&EIO=3&transport=websocket&t=...&sid=...`. This is useful for directing pads to separate socket.io nodes. *