286 results · Clear filters · Feed
-
Medium 4.8
Potential local code execution in “Copy as cURL” command
Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox…
-
Medium 4.3
Error handling for script execution was incorrectly isolated from web content
Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.
-
Medium 6.5
Tracking Links in Attachments Bypassed Remote Content Blocking
It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fix…
-
Medium 4.8
Unsafe attribute access during XPath parsing
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixe…
-
Medium 6.4
User Interface (UI) Misrepresentation of attachment URL
When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the correct link is used on click, the misleading hover text could trick …
-
Medium 6.3
Leak of hashed Window credentials via crafted attachment URL
Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attac…
-
Medium 6.3
Information Disclosure of /tmp directory listing
By crafting a malformed file name for an attachment in a multipart message, an attacker can trick Thunderbird into including a directory listing of /tmp when the message is forwarded or edited as a new message. This vulnerability could allow attackers to disc…
-
Medium 6.5
Use-after-free triggered by XSLTProcessor
JavaScript code running while transforming a document with the XSLTProcessor could lead to a use-after-free. This vulnerability was fixed in Firefox 137, Firefox ESR 115.22, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.
-
Medium 5.3
Downloading of OpenPGP keys from WKD used incorrect padding
When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network observer could have learned the length of the requested email address. This vulnerability was fixed in Thunderbird 136 and Thunderbird 128.8.
-
Medium 6.5
Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8
Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.…
-
Medium 4.3
Clickjacking the registerProtocolHandler info-bar
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
-
Medium 6.5
Unexpected GC during RegExp bailout processing
It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and…
-
Medium 5.4CVE-2025-1015 Public exploit
Unsanitized address book fields
The Thunderbird Address Book URI fields contained unsanitized links. This could be used by an attacker to create and export an address book containing a malicious payload in a field. For example, in the “Other” field of the Instant Messaging section. If anoth…
-
Medium 6.5
Address of e-mail sender can be spoofed by malicious email
Thunderbird displayed an incorrect sender address if the From field of an email used the invalid group name syntax that is described in CVE-2024-49040. This vulnerability was fixed in Thunderbird 128.7 and Thunderbird 135.
-
Medium 6.5
Potential opening of private browsing tabs in normal browsing windows
A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
-
Medium 6.5CVE-2025-0242 EPSS 15%
Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5, Thunderbird 115.18, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could ha…
-
Medium 5.1
Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.…
-
Medium 5.3
Use-after-free when breaking lines in text
Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 12…
-
Medium 4.0
Alt-Svc ALPN validation failure when redirected
When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
-
Medium 4.0
Compartment mismatch when parsing JavaScript JSON module
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
-
Medium 5.4
WebChannel APIs susceptible to confused deputy attack
The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox…
-
Medium 5.4
The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature ve…
-
Medium 5.4
A crafted URL containing Arabic script and whitespace characters could have hidden the true origin of the page, resulti…
-
Medium 6.1
Enhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP `frame-src` bypass and DOM-based XSS th…
-
Medium 4.3
An attacker could cause a select dropdown to be shown over another tab; this could have led to user confusion and possi…
-
Medium 5.3
Using remote content in OpenPGP encrypted messages can lead to the disclosure of plaintext. This vulnerability affects …
-
Medium 5.3
matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal
matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. matrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbit…
-
Medium 6.1
In multipart/x-mixed-replace responses, `Content-Disposition: attachment` in the response header was not respected and …
-
Medium 5.4
The origin of an external protocol handler prompt could have been obscured using a data: URL within an `iframe`. This v…
-
Medium 6.5
An attacker could have caused a use-after-free when accessibility was enabled, leading to a potentially exploitable cra…
-
Medium 6.5
A permission leak could have occurred from a trusted site to an untrusted site via `embed` or `object` elements. This v…
-
Medium 6.1
A missing delay in directory upload UI could have made it possible for an attacker to trick a user into granting permis…
-
Medium 5.3
By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine i…
-
Medium 6.1
An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://devto…
-
Medium 6.5
When aborting the verification of an OTR chat session, an attacker could have caused a use-after-free bug leading to a …
-
Medium 6.1
If a site had been granted the permission to open popup windows, it could cause Select elements to appear on top of ano…
-
Medium 4.7
Race condition in permission assignment
A race condition could lead to a cross-origin container obtaining permissions of the top-level origin. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.
-
Medium 4.7
By tricking the browser with a `X-Frame-Options` header, a sandboxed iframe could have presented a button that, if clic…
-
Medium 6.1
Offscreen Canvas did not properly track cross-origin tainting, which could be used to access image data from another si…
-
Medium 4.3
By monitoring the time certain operations take, an attacker could have guessed which external protocol handlers were fu…