An issue was discovered in Joomla! before 3.9.7. The subform fieldtype does not sufficiently filter or validate input of subfields. This leads to XSS attack vectors.

In Joomla! 3.2.0 through 3.6.5 (fixed in 3.7.0), inadequate escaping of file and folder names leads to XSS vulnerabilities in the template manager component.

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.0.13 (aka Sunglow) allow remote attackers to inject arbitrary web script or HTML via unspecified vectors in the (1) com_search, (2) com_content, and (3) mod_login components. NOTE: some of these details are obtained from third party information.

In Joomla! 1.5.0 through 3.6.5 (fixed in 3.7.0), inadequate filtering of multibyte characters leads to XSS vulnerabilities in various components.

Multiple cross-site scripting (XSS) vulnerabilities in the StackIdeas Komento (com_komento) component before 1.7.3 for Joomla! allow remote attackers to inject arbitrary web script or HTML via the (1) website or (2) latitude parameter in a comment to the default URI.

An XSS issue was discovered in the language switcher module in Joomla! 1.6.0 through 3.8.8 before 3.8.9. In some cases, the link of the current language might contain unescaped HTML special characters. This may lead to reflective XSS via injection of arbitrary parameters and/or values on the current page URL.

Cross-site scripting (XSS) vulnerability in Joomla! before 1.0.12 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, possibly related to poll.php or the module title.

Multiple cross-site scripting (XSS) vulnerabilities in the Table JX (com_grid) component for Joomla! allow remote attackers to inject arbitrary web script or HTML via the (1) data_search and (2) rpp parameters to index.php.

In Joomla! 3.2.0 through 3.6.5 (fixed in 3.7.0), inadequate filtering leads to XSS in the template manager component.

Multiple cross-site scripting (XSS) vulnerabilities in the Webee Comments (com_webeecomment) component 1.1.1, 1.2, and 2.0 for Joomla! allow remote attackers to inject arbitrary web script or HTML via the (1) color, (2) img, or (3) url BBCode tags in unspecified vectors.

Cross-site scripting (XSS) vulnerability in the Hotel Booking Reservation System (aka HBS or com_hbssearch) component for Joomla! allows remote attackers to inject arbitrary web script or HTML via the adult parameter in a showhoteldetails action to index.php.

Cross-site scripting (XSS) vulnerability in gmap.php in the Almond Classifieds (com_aclassf) component 7.5 for Joomla! allows remote attackers to inject arbitrary web script or HTML via the addr parameter.

Cross-site scripting (XSS) vulnerability in index.php in the beamospetition (com_beamospetition) 1.0.12 component for Joomla! allows remote attackers to inject arbitrary web script or HTML via the pet parameter in a sign action.

An issue was discovered in Joomla! before 3.9.15. Inadequate escaping of usernames allows XSS attacks in com_actionlogs.

Cross-site scripting (XSS) vulnerability in manage.php in the PBBooking (com_pbbooking) component 2.4 for Joomla! allows remote attackers to inject arbitrary web script or HTML via the an arbitrary parameter in an edit action to administrator/index.php.

An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page

An issue was discovered in Joomla! 3.0.0 through 3.9.27. Inadequate escaping in the imagelist view of com_media leads to a XSS vulnerability.

An issue was discovered in Joomla! 3.0.0 through 3.9.26. HTML was missing in the executable block list of MediaHelper::canUpload, leading to XSS attack vectors.

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.7.0 allow remote attackers to inject arbitrary web script or HTML via (1) the URI to includes/application.php, reachable through index.php; and, when Internet Explorer or Konqueror is used, (2) allow remote attackers to inject arbitrary web script or HTML via the searchword parameter in a search action to index.php in the com_search component. NOTE: vector 2 exists because of an incomplete fix for CVE-2011-2509.5.

Joomla! 2.5.x before 2.5.8 and 3.0.x before 3.0.2 allows remote attackers to conduct clickjacking attacks via unspecified vectors involving "Inadequate protection."

An issue was discovered in Joomla! before 3.9.3. The "No Filtering" textfilter overrides child settings in the Global Configuration. This is intended behavior. However, it might be unexpected for the user because the configuration dialog lacks an additional message to explain this.

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.0.4 allow remote attackers to inject arbitrary web script or HTML via (1) "GET and other variables" and (2) "SEF".

Joomla! 1.6.x before 1.6.2 does not prevent page rendering inside a frame in a third-party HTML document, which makes it easier for remote attackers to conduct clickjacking attacks via a crafted web site.

An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in the AJAX reordering endpoint.

jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If an unsanitized source object contained an enumerable __proto__ property, it could extend the native Object.prototype.

An issue was discovered in Joomla! 3.0.0 through 3.9.24. Extracting an specifilcy crafted zip package could write files outside of the intended path.

Open redirect vulnerability in Joomla! CMS 3.0.0 through 3.4.1.

An issue was discovered in Joomla! 3.0.0 through 3.9.26. A missing token check causes a CSRF vulnerability in data download endpoints in com_banners and com_sysinfo.

CRLF injection vulnerability in Joomla! before 1.0.13 (aka Sunglow) allows remote attackers to inject arbitrary HTTP headers and probably conduct HTTP response splitting attacks via CRLF sequences in the url parameter. NOTE: this can be leveraged for cross-site scripting (XSS) attacks. NOTE: some of these details are obtained from third party information.

Cross-site scripting (XSS) vulnerability in mod_lettermansubscribe.php in the Letterman Subscriber (mod_letterman) before 1.2.5 module for Joomla! allows remote attackers to inject arbitrary web script or HTML via the Itemid parameter.

An issue was discovered in Joomla! Core before 3.8.8. A long running background process, such as remote checks for core or extension updates, could create a race condition where a session that was expected to be destroyed would be recreated.

An issue was discovered in Joomla! 2.5.0 through 3.9.27. Install action in com_installer lack the required hardcoded ACL checks for superusers. A default system is not affected cause the default ACL for com_installer is limited to super users already.

The stripImages and stripIframes methods didn't properly process inputs, leading to XSS vectors.

An issue was discovered in Joomla! before 3.9.2. Inadequate checks of the Global Configuration helpurl settings allowed stored XSS.

The wrapper extensions do not correctly validate inputs, leading to XSS vectors.

Multiple cross-site scripting (XSS) vulnerabilities in the com_listing component in Barter Sites component 1.3 for Joomla! allow remote authenticated users to inject arbitrary web script or HTML via the (1) listing_title, (2) description, (3) homeurl (aka Website Address), (4) paystring (aka Payment types accepted), (5) sell_price, (6) shipping_cost, and (7) quantity parameters to index.php.

Multiple Cross-site Scripting (XSS) vulnerabilities exist in Joomla! through 1.7.0 in index.php in the search word, extension, asset, and author parameters.

Inadequate input validation leads to XSS vulnerabilities in the accessiblemedia field.

Inadequate input validation for media selection fields lead to XSS vulnerabilities in various extensions.

Multiple cross-site scripting (XSS) vulnerabilities in the Back End in Joomla! 1.5.x before 1.5.20 allow remote authenticated users to inject arbitrary web script or HTML via administrator screens.

The fancyselect list field layout does not correctly escape inputs, leading to a self-XSS vector.

Improper handling of input could lead to an XSS vector in the StringHelper::truncate method.

Inadequate escaping of mail addresses lead to XSS vulnerabilities in various components.

Inadequate content filtering leads to XSS vulnerabilities in various components.

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! 1.5 through 1.5.9 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors to the (1) com_admin component, (2) com_search component when "Gather Search Statistics" is enabled, and (3) the category view in the com_content component.

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! 1.5.7 and earlier allow remote authenticated users with certain privileges to inject arbitrary web script or HTML via (1) the title and description parameters to the com_weblinks module and (2) unspecified vectors in the com_content module related to "article submission."

The mail template feature lacks an escaping mechanism, causing XSS vectors in multiple extensions.

The Custom Fields component not correctly filter inputs, leading to a XSS vector.

An issue was discovered in Joomla! 4.2.0 through 4.2.3. Inadequate filtering of potentially malicious user input leads to reflected XSS vulnerabilities in various components.

An issue was discovered in Joomla! 4.0.0 through 4.2.4. Inadequate filtering of potentially malicious user input leads to reflected XSS vulnerabilities in com_media.