Zulip 8.3 is vulnerable to Cross Site Scripting (XSS) via the replace_emoji_with_text function in ui_util.ts.Referenceshttps://github.com/zulip/zulip/commit/191345f9d61f5b15762fe3ce19bf635bf885176ahttps://github.com/zulip/zulip/blob/8.3/web/src/ui_util.ts#L24https://gist.github.com/1047524396/f7ada389ed2686481efef9e1f8307c51
