Last modified: 2014-09-05 05:25:38 UTC
Topic title is text, so HTML entities in it simply appear. But when you view a standalone topic (from a permalink, or when you open a topic action action in a new tab, or presumably when you choose a topic action with no-JavaScript), Flow puts the un-escaped topic title in the <h1 class="firstHeading"> and in the <title> tag. Compare the URL above with https://test.wikipedia.org/wiki/Talk:Sandbox?workflow=rxpkw658tqvrvnsd
Change 143552 had a related patch set uploaded by Spage: Escape topic title HTML shown in h1 firstHeading https://gerrit.wikimedia.org/r/143552
Added to backlog: https://trello.com/c/0k2bX2qe
Change 143552 merged by jenkins-bot: Escape topic title HTML shown in h1 firstHeading https://gerrit.wikimedia.org/r/143552
Fixed in 1.24wmf13