Cross-site scripting (XSS) vulnerability in jquery.ui.dialog.js in the Dialog widget in jQuery UI before 1.10.0 allows remote attackers to inject arbitrary web script or HTML via the title option.

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.

In Apache HTTP Server 2.4.0-2.4.39, a limited cross-site scripting issue was reported affecting the mod_proxy error page. An attacker could cause the link on the error page to be malformed and instead point to a page of their choice. This would only be exploitable where a server was set up with proxying enabled but was misconfigured in such a way that the Proxy Error page was displayed.

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In mod_auth_openidc before version 2.4.9, there is an XSS vulnerability in when using `OIDCPreservePost On`.

Chromium: CVE-2021-30621 UI Spoofing in Autofill

Incorrect security UI in Navigation in Google Chrome on Android prior to 92.0.4515.131 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Incorrect security UI in payments in Google Chrome on Android prior to 91.0.4472.77 allowed a remote attacker to perform domain spoofing via a crafted HTML page.

Incorrect security UI in Downloads in Google Chrome on Android prior to 92.0.4515.107 allowed a remote attacker to perform domain spoofing via a crafted HTML page.

Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2, Thunderbird before 24.2, and SeaMonkey before 2.23 do not recognize a user's removal of trust from an EV X.509 certificate, which makes it easier for man-in-the-middle attackers to spoof SSL servers in opportunistic circumstances via a valid certificate that is unacceptable to the user.

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. On ChangesList special pages such as Special:RecentChanges and Special:Watchlist, some of the rcfilters-filter-* label messages are output in HTML unescaped, leading to XSS.

A port redirection issue was addressed with additional port validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. A malicious website may be able to access restricted ports on arbitrary servers.

A cross-site scripting (XSS) vulnerability in the HTML Data Processor for CKEditor 4.0 before 4.14 allows remote attackers to inject arbitrary web script through a crafted "protected" comment (with the cke_protected syntax).

Inappropriate implementation in sharing in Google Chrome prior to 83.0.4103.61 allowed a remote attacker to spoof security UI via a crafted HTML page.

Inappropriate implementation in V8 in Google Chrome prior to 80.0.3987.149 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Insufficient policy enforcement in downloads in Google Chrome prior to 83.0.4103.61 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.

Insufficient data validation in site information in Google Chrome prior to 83.0.4103.61 allowed a remote attacker to spoof security UI via a crafted domain name.

Insufficient policy enforcement in navigations in Google Chrome prior to 83.0.4103.61 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.

Insufficient policy enforcement in Blink in Google Chrome prior to 85.0.4183.83 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Inappropriate implementation in Omnibox in Google Chrome on iOS prior to 85.0.4183.83 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.

Insufficient policy enforcement in URL formatting in Google Chrome prior to 83.0.4103.61 allowed a remote attacker to perform domain spoofing via a crafted domain name.

Insufficient policy enforcement in extensions in Google Chrome prior to 80.0.3987.87 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension.

An XSS issue was discovered in Roundcube Webmail before 1.2.13, 1.3.x before 1.3.16, and 1.4.x before 1.4.10. The attacker can send a plain text e-mail message, with JavaScript in a link reference element that is mishandled by linkref_addindex in rcube_string_replacer.php.