Open redirect vulnerability in htdocs/user.php in XOOPS 2.0.18 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the xoops_redirect parameter.
The b_system_comments_show function in htdocs/modules/system/blocks/system_blocks.php in XOOPS before 2.0.18 does not check permissions, which allows remote attackers to read the comments in restricted modules.