TikiWiki CMS/Groupware before 6.7 LTS and before 8.4 allows remote attackers to execute arbitrary PHP code via a crafted serialized object in the (1) cookieName to lib/banners/bannerlib.php; (2) printpages or (3) printstructures parameter to (a) tiki-printmultipages.php or (b) tiki-printpages.php; or (4) sendpages, (5) sendstructures, or (6) sendarticles parameter to tiki-sendobjects.php, which is not properly handled when processed by the unserialize function.

Multiple SQL injection vulnerabilities in TikiWiki CMS/Groupware 4.x before 4.2 allow remote attackers to execute arbitrary SQL commands via unspecified vectors, probably related to (1) tiki-searchindex.php and (2) tiki-searchresults.php.

The userlogout function in TikiWiki CMS/Groupware 4.x before 4.2 does not properly delete user login cookies, which allows remote attackers to gain access via cookie reuse.

TikiWiki CMS/Groupware 8.3 and earlier allows remote attackers to obtain the installation path via a direct request to (1) admin/includecalendar.php, (2) tiki-rsserror.php, or (3) tiki-watershedservice.php.

Cross-site scripting (XSS) vulnerability in tiki-cookie-jar.php in TikiWiki CMS/Groupware before 8.2 and LTS before 6.5 allows remote attackers to inject arbitrary web script or HTML via arbitrary parameters.