Reference: MISC:https://sitewat.ch/Advisory/View/4 Multiple cross-site scripting (XSS) vulnerabilities in the wiki application in Yaws 1.88 allow remote attackers to inject arbitrary web script or HTML via (1) the tag parameter to editTag.yaws, (2) the index parameter to showOldPage.yaws, (3) the node parameter to allRefsToMe.yaws, or (4) the text parameter to editPage.yaws.
This issue does not affects the version of yaws package as shipped with Fedora and EPEL, since we dont ship the wiki component.
Wrong yaws (yaws is a minimal web server, yaws-wiki is a wiki).