Cross-site scripting (XSS) vulnerability in pmwiki.php in PmWiki 2.2.20 allows remote attackers to inject arbitrary web script or HTML via the from parameter to Main/WikiSandbox. NOTE: some of these details are obtained from third party information.
pmwiki.php in PmWiki 2.1 beta 20, with register_globals enabled, allows remote attackers to bypass protection mechanisms that deregister global variables by setting both a GPC variable and a GLOBALS[] variable with the same name, which causes PmWiki to unset the GLOBALS[] variable but not the GPC variable, which creates resultant vulnerabilities such as remote file inclusion and cross-site scripting (XSS).
Cross-site scripting (XSS) vulnerability in the Search module in PmWiki up to 2.0.12 allows remote attackers to inject arbitrary web script or HTML via the q parameter.
PmWiki before 2.2.21 has XSS.