Cross-site scripting (XSS) vulnerability in the Quizz module for XOOPS 1.0, when allowing on-line question development, allows remote attackers to inject arbitrary web script or HTML via a javascript: URL in the SRC attribute of an IMG tag.

SQL injection vulnerability in index.php of WebChat 1.5 included in XOOPS 1.0 allows remote attackers to execute arbitrary SQL commands via the roomid parameter.

Cross-site scripting (XSS) vulnerability in the MytextSanitizer function in XOOPS 1.3.5 through 1.3.9 and XOOPS 2.0 through 2.0.1 allows remote attackers to inject arbitrary web script or HTML via a javascript: URL in an IMG tag.

XOOPS 2.0, and possibly earlier versions, allows remote attackers to obtain sensitive information via an invalid xoopsOption parameter, which reveals the installation path in an error message.

Multiple cross-site scripting (XSS) vulnerabilities in XOOPS 0.94 and 1.0 allow remote attackers to execute arbitrary web script and HTML via the (1) terme parameter to search.php or (2) letter parameter to letter.php.

Cross-site scripting (XSS) vulnerability in viewtopic.php in Xoops 2.x, possibly 2 through 2.0.5, allows remote attackers to inject arbitrary web script or HTML via the (1) forum and (2) topic_id parameters.

The custom avatar uploading feature (uploader.php) for XOOPS 2.0.9.2 and earlier allows remote attackers to upload arbitrary PHP scripts, whose file extensions are not filtered.

Multiple cross-site scripting (XSS) vulnerabilities in XOOPS 2.0.11 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) order parameter to edit.php or (2) cid parameter to comment_edit.php.

SQL injection vulnerability in the loginUser function in the XMLRPC server in XOOPS 2.0.11 and earlier allows remote attackers to execute arbitrary SQL commands and bypass authentication via crafted values in an XML file, as demonstrated using the blogger.getPost method.

Multiple cross-site scripting (XSS) vulnerabilities in XOOPS 2.0.12 JP and earlier, XOOPS 2.0.13.1 and earlier, and 2.2.x up to 2.2.3 RC1 allow remote attackers to inject arbitrary web script or HTML via (1) modules that use "XOOPS Code" and (2) newbb in the forum module.

Directory traversal vulnerability in editor_registry.php in XOOPS 2.2.3 allows remote attackers to read or include arbitrary local files via a .. (dot dot) in the xoopsConfig[language] parameter.

Cross-site scripting (XSS) vulnerability in a certain module, possibly poll or Pool, for XOOPS allows remote attackers to inject arbitrary web script or HTML via JavaScript in the SRC attribute of an IMG element in a comment.

mainfile.php in XOOPS 2.0.13.2 and earlier, when register_globals is enabled, allows remote attackers to overwrite variables such as $xoopsOption['nocommon'] and conduct directory traversal attacks or include PHP files via (1) xoopsConfig[language] to misc.php or (2) xoopsConfig[theme_set] to index.php, as demonstrated by injecting PHP sequences into a log file.

userinfo.php in XOOPS 1.0 RC1 allows remote attackers to obtain sensitive information via a SQL injection attack in the "uid" parameter.

SQL injection vulnerability in edituser.php in Xoops before 2.0.15 allows remote attackers to execute arbitrary SQL commands via the user_avatar parameter.

XOOPS CMS 2.5.9 SQL Injection via gerar_pdf.php

XOOPS CMS 2.5.9 contains an SQL injection vulnerability that allows unauthenticated attackers to manipulate database queries by injecting SQL code through the cid parameter. Attackers can send GET requests to the gerar_pdf.php endpoint with malicious cid values to extract sensitive database information.

SQL injection vulnerability in XOOPS 2.5.7.2 and other versions before 2.5.8.1 allows remote authenticated administrators to execute arbitrary SQL commands via the url parameter to findusers.php. An example attack uses "into outfile" to create a backdoor program.

XOOPS Core 2.5.8.1 has XSS due to unescaped HTML output of an Install DB failure error message in page_dbsettings.php.

XOOPS Core 2.5.8 has a stored URL redirect bypass vulnerability in /modules/profile/index.php because of the URL filter.

In install/page_dbsettings.php in the Core distribution of XOOPS 2.5.8.1, unfiltered data passed to CREATE and ALTER SQL queries caused SQL Injection in the database settings page, related to use of GBK in CHARACTER SET and COLLATE clauses.