Mozilla Thunderbird vulnerabilities

CVE-2019-11715 [MEDIUM] CWE-79 CVE-2019-11715: Due to an error while parsing page content, it is possible for properly sanitized user input to be m Due to an error while parsing page content, it is possible for properly sanitized user input to be misinterpreted and lead to XSS hazards on web sites in certain circumstances. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

CVE-2010-3178 [MEDIUM] CWE-264 CVE-2010-3178: Mozilla Firefox before 3.5.14 and 3.6.x before 3.6.11, Thunderbird before 3.0.9 and 3.1.x before 3.1 Mozilla Firefox before 3.5.14 and 3.6.x before 3.6.11, Thunderbird before 3.0.9 and 3.1.x before 3.1.5, and SeaMonkey before 2.0.9 do not properly handle certain modal calls made by javascript: URLs in circumstances related to opening a new window and performing cross-domain navigation, which allows remote attackers to bypass the Same Origin Policy vi

CVE-2006-3804 [MEDIUM] CVE-2006-3804: Heap-based buffer overflow in Mozilla Thunderbird before 1.5.0.5 and SeaMonkey before 1.0.3 allows r Heap-based buffer overflow in Mozilla Thunderbird before 1.5.0.5 and SeaMonkey before 1.0.3 allows remote attackers to cause a denial of service (crash) via a VCard attachment with a malformed base64 field, which copies more data than expected due to an integer underflow.

CVE-2014-1586 [MEDIUM] CVE-2014-1586: content/base/src/nsDocument.cpp in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Th content/base/src/nsDocument.cpp in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 does not consider whether WebRTC video sharing is occurring, which allows remote attackers to obtain sensitive information from the local camera in certain IFRAME situations by maintaining a session after the user temporarily navigate

CVE-2014-1585 [MEDIUM] CVE-2014-1585: The WebRTC video-sharing feature in dom/media/MediaManager.cpp in Mozilla Firefox before 33.0, Firef The WebRTC video-sharing feature in dom/media/MediaManager.cpp in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 does not properly recognize Stop Sharing actions for videos in IFRAME elements, which allows remote attackers to obtain sensitive information from the local camera by maintaining a session after the user

CVE-2006-0236 [MEDIUM] CWE-94 CVE-2006-0236: GUI display truncation vulnerability in Mozilla Thunderbird 1.0.2, 1.0.6, and 1.0.7 allows user-assi GUI display truncation vulnerability in Mozilla Thunderbird 1.0.2, 1.0.6, and 1.0.7 allows user-assisted attackers to execute arbitrary code via an attachment with a filename containing a large number of spaces ending with a dangerous extension that is not displayed by Thunderbird, along with an inconsistent Content-Type header, which could be used to

CVE-2014-1539 [MEDIUM] CWE-20 CVE-2014-1539: Mozilla Firefox before 30.0 and Thunderbird through 24.6 on OS X do not ensure visibility of the cur Mozilla Firefox before 30.0 and Thunderbird through 24.6 on OS X do not ensure visibility of the cursor after interaction with a Flash object and a DIV element, which makes it easier for remote attackers to conduct clickjacking attacks via JavaScript code that produces a fake cursor image.

CVE-2020-12405 [MEDIUM] CWE-362 CVE-2020-12405: When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a potentially exploitable crash. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

CVE-2008-0591 [MEDIUM] CVE-2008-0591: Mozilla Firefox before 2.0.0.12 and Thunderbird before 2.0.0.12 does not properly manage a delay tim Mozilla Firefox before 2.0.0.12 and Thunderbird before 2.0.0.12 does not properly manage a delay timer used in confirmation dialogs, which might allow remote attackers to trick users into confirming an unsafe action, such as remote file execution, by using a timer to change the window focus, aka the "dialog refocus bug" or "ffclick2".

CVE-2019-9797 [MEDIUM] CVE-2019-9797: Cross-origin images can be read in violation of the same-origin policy by exporting an image after using createImageBitmap to read the image and then Cross-origin images can be read in violation of the same-origin policy by exporting an image after using createImageBitmap to read the image and then rendering the resulting bitmap image within a canvas element. This vulnerability affects Firefox < 66.

CVE-2017-7782 [MEDIUM] CWE-269 CVE-2017-7782: An error in the "WindowsDllDetourPatcher" where a RWX ("Read/Write/Execute") 4k block is allocated b An error in the "WindowsDllDetourPatcher" where a RWX ("Read/Write/Execute") 4k block is allocated but never protected, violating DEP protections. Note: This attack only affects Windows operating systems. Other operating systems are not affected. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

CVE-2012-1960 [MEDIUM] CWE-200 CVE-2012-1960: The qcms_transform_data_rgb_out_lut_sse2 function in the QCMS implementation in Mozilla Firefox 4.x The qcms_transform_data_rgb_out_lut_sse2 function in the QCMS implementation in Mozilla Firefox 4.x through 13.0, Thunderbird 5.0 through 13.0, and SeaMonkey before 2.11 might allow remote attackers to obtain sensitive information from process memory via a crafted color profile that triggers an out-of-bounds read operation.

CVE-2016-5294 [MEDIUM] CWE-20 CVE-2016-5294: The Mozilla Updater can be made to choose an arbitrary target working directory for output files res The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability requires local system access. Note: this issue only affects Windows operating systems. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

CVE-2019-9817 [MEDIUM] CWE-346 CVE-2019-9817: Images from a different domain can be read using a canvas object in some circumstances. This could b Images from a different domain can be read using a canvas object in some circumstances. This could be used to steal image data from a different site in violation of same-origin policy. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

CVE-2004-0765 [HIGH] CVE-2004-0765: The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7 The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.

CVE-2011-2986 [MEDIUM] CWE-200 CVE-2011-2986: Mozilla Firefox 4.x through 5, Thunderbird before 6, SeaMonkey 2.x before 2.3, and possibly other pr Mozilla Firefox 4.x through 5, Thunderbird before 6, SeaMonkey 2.x before 2.3, and possibly other products, when the Direct2D (aka D2D) API is used on Windows, allows remote attackers to bypass the Same Origin Policy, and obtain sensitive image data from a different domain, by inserting this data into a canvas.

CVE-2012-3986 [MEDIUM] CWE-20 CVE-2012-3986: Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ES Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 do not properly restrict calls to DOMWindowUtils (aka nsDOMWindowUtils) methods, which allows remote attackers to bypass intended access restrictions via crafted JavaScript code.

CVE-2025-4089 [MEDIUM] CWE-77 CVE-2025-4089: Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could Due to insufficient escaping of special characters 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 138 and Thunderbird 138.

CVE-2025-4087 [MEDIUM] CWE-125 CVE-2025-4087: A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior d 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 fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.

CVE-2026-109723 Mozilla Foundation Security Advisory 2026-109: CVE-2026-109723 Mozilla Foundation Security Advisory 2026-109 CVE: CVE-2026-109723 Product: Thunderbird Impact: low Fixed in: Thunderbird 158