Date: Fri, 5 Apr 2019 11:45:01 +0200 From: Hanno Böck <hanno@...eck.de> To: oss-security@...ts.openwall.com Subject: XSS in roundup bug tracker 404 page Hi, I recently discovered that the python bug tracker had a trivial reflected Cross Site Scripting vulnerability on the 404 error page. It essentially just reflected the URL path, so anything like http://hostname/<img src=x onerror=alert(1)> (properly URL-encoded, but browsers do this automatically) would result in XSS. The software python is using here is the Roundup issue tracker, it's been reported there as well  and fixed in their repo (but no release yet).  https://github.com/python/bugs.python.org/issues/34  https://issues.roundup-tracker.org/issue2551035 -- Hanno Böck https://hboeck.de/ mail/jabber: hanno@...eck.de GPG: FE73757FA60E4E21B937579FA5880072BBB51E42
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