A crafted URL using a blob: URI could have hidden the true origin of the page, resulting in a potential spoofing attack. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 141.

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.

Insufficient validation of untrusted input in Core in Google Chrome prior to 139.0.7258.66 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page. (Chromium security severity: Low)

Inappropriate implementation in Permissions in Google Chrome prior to 139.0.7258.66 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)

Inappropriate implementation in WebApp Installs in Google Chrome on Android prior to 111.0.5563.64 allowed an attacker who convinced a user to install a malicious WebApp to spoof the contents of the PWA installer via a crafted HTML page. (Chromium security severity: Medium)

Insufficient policy enforcement in Extensions API in Google Chrome prior to 111.0.5563.64 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension. (Chromium security severity: Medium)

Inappropriate implementation in Filesystems in Google Chrome prior to 139.0.7258.66 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)

Inappropriate implementation in Picture In Picture in Google Chrome prior to 139.0.7258.66 allowed a remote attacker who convinced a user to engage in specific UI gestures to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

Inappropriate implementation in Picture In Picture in Google Chrome prior to 139.0.7258.66 allowed a remote attacker who convinced a user to engage in specific UI gestures to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)

Insufficient policy enforcement in Intents in Google Chrome on Android prior to 111.0.5563.64 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Medium)

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.

Insufficient policy enforcement in Navigation in Google Chrome on iOS prior to 111.0.5563.64 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Medium)

Inappropriate implementation in Downloads in Google Chrome prior to 123.0.6312.58 allowed a remote attacker to perform UI spoofing via a crafted URL. (Chromium security severity: Medium)

Inappropriate implementation in iOS in Google Chrome prior to 123.0.6312.58 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)

Incorrect security UI in iOS in Google Chrome prior to 123.0.6312.58 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

When a URL was provided in a link querystring parameter, Firefox for Android would follow that URL instead of the correct URL, potentially leading to phishing attacks. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140.

By confusing the browser, the fullscreen notification could have been delayed or suppressed, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox < 108.

A website could have obscured the fullscreen notification by using a dropdown select input element. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 123, Firefox ESR < 115.8, and Thunderbird < 115.8.

The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability affects Firefox < 140 and Thunderbird < 140.

Insufficient policy enforcement in contacts picker in Google Chrome on Android prior to 96.0.4664.45 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Inappropriate implementation in Blink in Google Chrome prior to 131.0.6778.69 allowed a remote attacker who convinced a user to engage in specific UI gestures to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

The incorrect domain may have been displayed in the address bar during an interrupted navigation attempt. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 133 and Thunderbird < 133.

Inappropriate implementation in FileSystem in Google Chrome prior to 131.0.6778.69 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page. (Chromium security severity: Low)

Opening maliciously-crafted URLs in Firefox from other apps such as Safari could have allowed attackers to spoof website addresses if the URLs utilized non-HTTP schemes used internally by the Firefox iOS client This vulnerability affects Firefox for iOS < 139.

An attacker could cause a select dropdown to be shown over another tab; this could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

A phishing site could have repurposed an `about:` dialog to show phishing content with an incorrect origin in the address bar. This vulnerability affects Firefox < 122 and Thunderbird < 115.7.

Inappropriate implementation in Compositing in Google Chrome prior to 119.0.6045.105 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

Inappropriate implementation in Autofill in Google Chrome prior to 121.0.6167.85 allowed a remote attacker to bypass Autofill restrictions via a crafted HTML page. (Chromium security severity: Low)

It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an incorrect timestamp used to prevent input after page load. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

Inappropriate implementation in Autofill in Google Chrome prior to 120.0.6099.62 allowed a remote attacker to bypass Autofill restrictions via a crafted HTML page. (Chromium security severity: Low)

Under certain conditions, Firefox did not display a warning when a user attempted to navigate to a new protocol handler. This vulnerability affects Firefox < 121.

A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This could have obscured the fullscreen notification and could have been leveraged in a spoofing attack. This vulnerability affects Firefox < 119.

Inappropriate implementation in Installer in Google Chrome prior to 118.0.5993.70 allowed a local attacker to bypass discretionary access control via a crafted command. (Chromium security severity: Low)

Inappropriate implementation in WebApp Provider in Google Chrome prior to 119.0.6045.105 allowed a remote attacker to obfuscate security UI via a crafted HTML page. (Chromium security severity: Low)

Inappropriate implementation in Autofill in Google Chrome prior to 118.0.5993.70 allowed a remote attacker to bypass autofill restrictions via a crafted HTML page. (Chromium security severity: Low)

Incorrect security UI in Downloads in Google Chrome prior to 119.0.6045.105 allowed a remote attacker to perform domain spoofing via a crafted domain name. (Chromium security severity: Medium)

Incorrect security UI in Downloads in Google Chrome prior to 119.0.6045.105 allowed a remote attacker to obfuscate security UI via a crafted HTML page. (Chromium security severity: Medium)

Inappropriate implementation in Downloads in Google Chrome prior to 119.0.6045.105 allowed a remote attacker to obfuscate security UI via a crafted HTML page. (Chromium security severity: Medium)

Inappropriate implementation in Input in Google Chrome prior to 118.0.5993.70 allowed a remote attacker to spoof security UI via a crafted HTML page. (Chromium security severity: Low)

Incorrect security UI in Picture In Picture in Google Chrome prior to 119.0.6045.105 allowed a remote attacker to perform domain spoofing via a crafted local HTML page. (Chromium security severity: Low)

The signature of a digitally signed S/MIME email message may optionally specify the signature creation date and time. If present, Thunderbird did not compare the signature creation date with the message date and time, and displayed a valid signature despite a date or time mismatch. This could be used to give recipients the impression that a message was sent at a different date or time. This vulnerability affects Thunderbird < 115.6.

When processing a PGP/MIME payload that contains digitally signed text, the first paragraph of the text was never shown to the user. This is because the text was interpreted as a MIME message and the first paragraph was always treated as an email header section. A digitally signed text from a different context, such as a signed GIT commit, could be used to spoof an email message. This vulnerability affects Thunderbird < 115.6.

Inappropriate implementation in Prompts in Google Chrome prior to 117.0.5938.62 allowed a remote attacker to spoof security UI via a crafted HTML page. (Chromium security severity: Medium)

Inappropriate implementation in Intents in Google Chrome on Android prior to 117.0.5938.62 allowed a remote attacker to obfuscate security UI via a crafted HTML page. (Chromium security severity: Low)

When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 83.

Insufficient policy enforcement in Downloads in Google Chrome prior to 117.0.5938.62 allowed a remote attacker to bypass Enterprise policy restrictions via a crafted download. (Chromium security severity: Medium)

Inappropriate implementation in Custom Tabs in Google Chrome on Android prior to 117.0.5938.62 allowed a remote attacker to obfuscate a permission prompt via a crafted HTML page. (Chromium security severity: Medium)

Insufficient policy enforcement in Autofill in Google Chrome prior to 117.0.5938.62 allowed a remote attacker to bypass Autofill restrictions via a crafted HTML page. (Chromium security severity: Low)

Inappropriate implementation in Input in Google Chrome prior to 117.0.5938.62 allowed a remote attacker to spoof security UI via a crafted HTML page. (Chromium security severity: Medium)