Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

browser/browsing_data/browsing_data_remover.cc in Google Chrome before 51.0.2704.63 deletes HPKP pins during cache clearing, which makes it easier for remote attackers to spoof web sites via a valid certificate from an arbitrary recognized Certification Authority.

Inappropriate implementation in WebApp Installer in Google Chrome prior to 95.0.4638.54 allowed a remote attacker to potentially overlay and spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Roland Gruber Softwareentwicklung LDAP Account Manager before 6.3 has XSS via the dn parameter to the templates/3rdParty/pla/htdocs/cmd.php URI or the template parameter to the templates/3rdParty/pla/htdocs/cmd.php?cmd=rename_form URI.

Apache Axis 1.x up to and including 1.4 is vulnerable to a cross-site scripting (XSS) attack in the default servlet/services.

In the Loofah gem through 2.2.0 for Ruby, non-whitelisted HTML attributes may occur in sanitized output by republishing a crafted HTML fragment.

WebKit/Source/devtools/front_end/devtools.js in the Developer Tools (aka DevTools) subsystem in Blink, as used in Google Chrome before 51.0.2704.79, does not ensure that the remoteFrontendUrl parameter is associated with a chrome-devtools-frontend.appspot.com URL, which allows remote attackers to bypass intended access restrictions via a crafted URL.

The WebContentsImpl::FocusLocationBarByDefault function in content/browser/web_contents/web_contents_impl.cc in Google Chrome before 50.0.2661.75 mishandles focus for certain about:blank pages, which allows remote attackers to spoof the address bar via a crafted URL.

Cross-site scripting (XSS) vulnerability in the ModuleSystem::RequireForJsInner function in extensions/renderer/module_system.cc in the Extensions subsystem in Google Chrome before 50.0.2661.75 allows remote attackers to inject arbitrary web script or HTML via a crafted web site, aka "Universal XSS (UXSS)."

The ServiceWorkerContainer::registerServiceWorkerImpl function in WebKit/Source/modules/serviceworkers/ServiceWorkerContainer.cpp in Blink, as used in Google Chrome before 51.0.2704.63, allows remote attackers to bypass the Content Security Policy (CSP) protection mechanism via a ServiceWorker registration.

The ssl_verify_server_cert function in sql-common/client.c in MariaDB before 5.5.47, 10.0.x before 10.0.23, and 10.1.x before 10.1.10; Oracle MySQL 5.5.48 and earlier, 5.6.29 and earlier, and 5.7.11 and earlier; and Percona Server do not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a "/CN=" string in a field in a certificate, as demonstrated by "/OU=/CN=bar.com/CN=foo.com."

Inappropriate implementation in referrer in Google Chrome prior to 96.0.4664.45 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.

Cross-site scripting (XSS) vulnerability in horde/templates/topbar/_menubar.html.php in Horde Groupware before 5.2.12 and Horde Groupware Webmail Edition before 5.2.12 allows remote attackers to inject arbitrary web script or HTML via the searchfield parameter, as demonstrated by a request to xplorer/gollem/manager.php.

When using an OCSP responder Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 did not correctly handle invalid responses. This allowed for revoked client certificates to be incorrectly identified. It was therefore possible for users to authenticate with revoked certificates when using mutual TLS. Users not using OCSP checks are not affected by this vulnerability.

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.

WebKit/Source/core/css/StyleSheetContents.cpp in Blink, as used in Google Chrome before 51.0.2704.63, permits cross-origin loading of CSS stylesheets by a ServiceWorker even when the stylesheet download has an incorrect MIME type, which allows remote attackers to bypass the Same Origin Policy via a crafted web site.

Multiple cross-site scripting (XSS) vulnerabilities in (1) revision.php, (2) log.php, (3) listing.php, and (4) comp.php in WebSVN allow context-dependent attackers to inject arbitrary web script or HTML via the name of a (a) file or (b) directory in a repository.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted HTML page.

offlineimap before 6.3.2 does not check for SSL server certificate validation when "ssl = yes" option is specified which can allow man-in-the-middle attacks.

Cross-site scripting (XSS) vulnerability in the Security component of Kohana before 3.3.6 allows remote attackers to inject arbitrary web script or HTML by bypassing the strip_image_tags protection mechanism in system/classes/Kohana/Security.php.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 67.0.3396.62 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

Insufficient policy enforcement in Blink in Google Chrome prior to 64.0.3282.119 allowed a remote attacker to potentially bypass content security policy via a crafted HTML page.

Incorrect handling of confusable characters in Omnibox in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

XSS vulnerabilities in Interstitials in Google Chrome prior to 65.0.3325.146 allowed an attacker who convinced a user to install a malicious extension or open Developer Console to inject arbitrary scripts or HTML via a crafted HTML page.

Incorrect security UI in Omnibox in Google Chrome prior to 64.0.3282.119 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Incorrect security UI in navigation in Google Chrome prior to 64.0.3282.119 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Lack of clearing the previous site before loading alerts from a new one in Blink in Google Chrome prior to 67.0.3396.62 allowed a remote attacker to perform domain spoofing via a crafted HTML page.

In KDE KMail 5.2.3, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.

Eliding from the wrong side in an infobar in DevTools in Google Chrome prior to 68.0.3440.75 allowed an attacker who convinced a user to install a malicious extension to Hide Chrome Security UI via a crafted Chrome Extension.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 68.0.3440.75 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

Improper handling of pending navigation entries in Navigation in Google Chrome on iOS prior to 66.0.3359.117 allowed a remote attacker to perform domain spoofing via a crafted HTML page.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 68.0.3440.75 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

The apt package in Debian jessie before 1.0.9.8.4, in Debian unstable before 1.4~beta2, in Ubuntu 14.04 LTS before 1.0.1ubuntu2.17, in Ubuntu 16.04 LTS before 1.2.15ubuntu0.2, and in Ubuntu 16.10 before 1.3.2ubuntu0.1 allows man-in-the-middle attackers to bypass a repository-signing protection mechanism by leveraging improper error handling when validating InRelease file signatures.

Inappropriate implementation in Compositing in Google Chrome on Android prior to 94.0.4606.54 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Incorrect security UI in permissions prompt in Google Chrome prior to 64.0.3282.119 allowed a remote attacker to spoof the origin to which permission is granted via a crafted HTML page.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 68.0.3440.75 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

Insufficient data validation in DevTools in Google Chrome prior to 64.0.3282.119 allowed a remote attacker to potentially leak user cross-origin data via a crafted Chrome Extension.

Insufficient data validation in DevTools in Google Chrome prior to 64.0.3282.119 allowed a remote attacker to potentially leak user cross-origin data via a crafted Chrome Extension.

A JavaScript focused window could overlap the fullscreen notification in Fullscreen in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to obscure the full screen warning via a crafted HTML page.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 68.0.3440.75 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

Incorrect handling of asynchronous methods in Fullscreen in Google Chrome on macOS prior to 66.0.3359.117 allowed a remote attacker to enter full screen without showing a warning via a crafted HTML page.

Cross-site scripting (XSS) vulnerability in the web UI in Mailman before 2.1.26 allows remote attackers to inject arbitrary web script or HTML via a user-options URL.

Incorrect handling of reloads in Navigation in Google Chrome prior to 68.0.3440.75 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Object lifecycle issue in Chrome Custom Tab in Google Chrome prior to 65.0.3325.146 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Incorrect handling of confusable characters in URL Formatter in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

Lack of timeout on extension install prompt in Extensions in Google Chrome prior to 68.0.3440.75 allowed a remote attacker to trigger installation of an unwanted extension via a crafted HTML page.

Missing confusable characters in Internationalization in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted domain name.

Incorrect handling of confusable characters in URL Formatter in Google Chrome on macOS prior to 66.0.3359.117 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.