CVE-2025-0237

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability.

Security Fix(es):

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 affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.(CVE-2025-0237)

When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.(CVE-2025-0241)

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 have been exploited to run arbitrary code. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Firefox ESR < 115.19, Thunderbird < 134, and Thunderbird < 128.6.(CVE-2025-0242)

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability.

Security Fix(es):

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 affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.(CVE-2025-0237)

When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.(CVE-2025-0241)

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 have been exploited to run arbitrary code. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Firefox ESR < 115.19, Thunderbird < 134, and Thunderbird < 128.6.(CVE-2025-0242)

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

A permission leak could have occurred from a trusted site to an untrusted site via embed or object elements. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Firefox ESR < 115.17, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10458)

An attacker could have caused a use-after-free when accessibility was enabled, leading to a potentially exploitable crash. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Firefox ESR < 115.17, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10459)

The origin of an external protocol handler prompt could have been obscured using a data: URL within an iframe. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10460)

In multipart/x-mixed-replace responses, Content-Disposition: attachment in the response header was not respected and did not force a download, which could allow XSS attacks. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10461)

Truncation of a long URL could have allowed origin spoofing in a permission prompt. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10462)

Video frames could have been leaked between origins in some situations. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Firefox ESR < 115.17, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10463)

Repeated writes to history interface attributes could have been used to cause a Denial of Service condition in the browser. This was addressed by introducing rate-limiting to this API. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10464)

A clipboard "paste" button could persist across tabs which allowed a spoofing attack. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10465)

By sending a specially crafted push message, a remote server could have hung the parent process, causing the browser to become unresponsive. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10466)

Memory safety bugs present in Firefox 131, Firefox ESR 128.3, and Thunderbird 128.3. 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. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10467)

Using remote content in OpenPGP encrypted messages can lead to the disclosure of plaintext. This vulnerability affects Thunderbird < 128.4.3 and Thunderbird < 132.0.1.(CVE-2024-11159)

Certain WebGL operations on Apple silicon M series devices could have lead to an out-of-bounds write and memory corruption due to a flaw in Apple's GPU driver.
This bug only affected the application on Apple M series hardware. Other platforms were unaffected. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Firefox ESR < 115.18, Thunderbird < 133, Thunderbird < 128.5, and Thunderbird < 115.18.(CVE-2024-11691)

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.(CVE-2024-11692)

The executable file warning was not presented when downloading .library-ms files.
Note: This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects…

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 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

• firefox: Use-after-free when breaking lines in text (CVE-2025-0238)
• firefox: Memory corruption when using JavaScript Text Segmentation (CVE-2025-0241)
• firefox: Alt-Svc ALPN validation failure when redirected (CVE-2025-0239)
• firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6 (CVE-2025-0243)
• firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 (CVE-2025-0242)
• firefox: WebChannel APIs susceptible to confused deputy attack (CVE-2025-0237)
• firefox: Compartment mismatch when parsing JavaScript JSON module (CVE-2025-0240)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

• firefox: Use-after-free when breaking lines in text (CVE-2025-0238)
• firefox: Memory corruption when using JavaScript Text Segmentation (CVE-2025-0241)
• firefox: Alt-Svc ALPN validation failure when redirected (CVE-2025-0239)
• firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6 (CVE-2025-0243)
• firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 (CVE-2025-0242)
• firefox: WebChannel APIs susceptible to confused deputy attack (CVE-2025-0237)
• firefox: Compartment mismatch when parsing JavaScript JSON module (CVE-2025-0240)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

• rebase from Thunderbird 115.4.1 to 140.12.0 ESR

• CVE-2022-3032: When receiving an HTML email that contained an iframe element, which used a srcdoc attribute to define the inner HTML document, remote objects specified in the nested document, for example images or videos, were not blocked

• CVE-2023-0430: Certificate OCSP revocation status was not checked when verifying S/Mime signatures

• CVE-2023-0547: OCSP revocation status of recipient certificates was not checked when sending S/Mime encrypted email, and revoked certificates would be accepted

• CVE-2023-0616: If a MIME email combines OpenPGP and OpenPGP MIME data in a certain way Thunderbird repeatedly attempts to process and display the message, which could cause Thunderbird's user interface to lock up and no longer respond to the user's actions

• CVE-2023-1945: Unexpected data returned from the Safe Browsing API could have led to memory corruption and a potentially exploitable crash

• CVE-2023-4573: When receiving rendering data over IPC mStream could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash

• CVE-2023-4574: When creating a callback over IPC for showing the Color Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished

• CVE-2023-4575: When creating a callback over IPC for showing the File Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished

• CVE-2023-4577: When UpdateRegExpStatics attempted to access initialStringHeap it could already have been garbage collected prior to entering the function, which could potentially have led to an exploitable crash

• CVE-2023-4578: When calling JS::CheckRegExpSyntax a Syntax Error could have been set which would end in calling convertToRuntimeErrorAndClear. A path in the function could attempt to allocate memory when none is available which would have caused a newly created Out of Memory exception to be mishandled as a Syntax Error

• CVE-2023-4580: Push notifications stored on disk in private browsing mode were not being encrypted potentially allowing the leak of sensitive information

• CVE-2023-4581: Excel .xll add-in files did not have a blocklist entry in Firefox's executable blocklist which allowed them to be downloaded without any warning of their potential harm

• CVE-2023-5169: A compromised content process could have provided malicious data in a PathRecording resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process

• CVE-2023-5171: During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash

• CVE-2023-5724: Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led to a crash

• CVE-2023-5725: A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data

• CVE-2023-5732: An attacker could have created a malicious link using bidirectional characters to spoof the location in the address bar when visited

• CVE-2023-6204: On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element

• CVE-2023-6205: It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash

• CVE-2023-6206: The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts

• CVE-2023-6207: Ownership…

WebChannel APIs susceptible to confused deputy attack. (CVE-2025-0237) Use-after-free when breaking lines in text. (CVE-2025-0238) Alt-Svc ALPN validation failure when redirected. (CVE-2025-0239) Compartment mismatch when parsing JavaScript JSON module. (CVE-2025-0240) Memory corruption when using JavaScript Text Segmentation. (CVE-2025-0241) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. (CVE-2025-0242) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. (CVE-2025-0243)

WebChannel APIs susceptible to confused deputy attack. (CVE-2025-0237) Use-after-free when breaking lines in text. (CVE-2025-0238) Alt-Svc ALPN validation failure when redirected. (CVE-2025-0239) Compartment mismatch when parsing JavaScript JSON module. (CVE-2025-0240) Memory corruption when using JavaScript Text Segmentation. (CVE-2025-0241) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. (CVE-2025-0242) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. (CVE-2025-0243)

These are all security issues fixed in the firefox-esr-128.6.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the MozillaFirefox-134.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the MozillaThunderbird-128.6.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the libmozjs-128-0-128.7.0-1.1 package on the GA media of openSUSE Tumbleweed.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

• firefox: Use-after-free when breaking lines in text (CVE-2025-0238)

• firefox: Memory corruption when using JavaScript Text Segmentation (CVE-2025-0241)

• firefox: Alt-Svc ALPN validation failure when redirected (CVE-2025-0239)

• firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6 (CVE-2025-0243)

• firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 (CVE-2025-0242)

• firefox: WebChannel APIs susceptible to confused deputy attack (CVE-2025-0237)

• firefox: Compartment mismatch when parsing JavaScript JSON module (CVE-2025-0240)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This update for MozillaFirefox fixes the following issues:

• Firefox Extended Support Release 128.6.0 ESR

  • Fixed: Various security fixes.

  MFSA 2025-02 (bsc#1234991)

  • CVE-2025-0237 (bmo#1915257) WebChannel APIs susceptible to confused deputy attack
  • CVE-2025-0238 (bmo#1915535) Use-after-free when breaking lines
  • CVE-2025-0239 (bmo#1929156) Alt-Svc ALPN validation failure when redirected
  • CVE-2025-0240 (bmo#1929623) Compartment mismatch when parsing JavaScript JSON module
  • CVE-2025-0241 (bmo#1933023) Memory corruption when using JavaScript Text Segmentation
  • CVE-2025-0242 (bmo#1874523, bmo#1926454, bmo#1931873, bmo#1932169) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
  • CVE-2025-0243 (bmo#1827142, bmo#1932783) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6

• Firefox Extended Support Release 128.5.2 ESR

  • Fixed: Fixed a crash experienced by Windows users with Qihoo 360 Total Security Antivirus software installed (bmo#1934258)

This update for MozillaFirefox fixes the following issues:

• Firefox Extended Support Release 128.6.0 ESR

  • Fixed: Various security fixes.

  MFSA 2025-02 (bsc#1234991)

  • CVE-2025-0237 (bmo#1915257) WebChannel APIs susceptible to confused deputy attack
  • CVE-2025-0238 (bmo#1915535) Use-after-free when breaking lines
  • CVE-2025-0239 (bmo#1929156) Alt-Svc ALPN validation failure when redirected
  • CVE-2025-0240 (bmo#1929623) Compartment mismatch when parsing JavaScript JSON module
  • CVE-2025-0241 (bmo#1933023) Memory corruption when using JavaScript Text Segmentation
  • CVE-2025-0242 (bmo#1874523, bmo#1926454, bmo#1931873, bmo#1932169) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
  • CVE-2025-0243 (bmo#1827142, bmo#1932783) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6

• Firefox Extended Support Release 128.5.2 ESR

  • Fixed: Fixed a crash experienced by Windows users with Qihoo 360 Total Security Antivirus software installed (bmo#1934258)

This update for MozillaThunderbird fixes the following issues:

Update to Mozilla Thunderbird ESR 128.6 (MFSA 2025-05, bsc#1234991)

Security fixes:

• CVE-2025-0237 (bmo#1915257) WebChannel APIs susceptible to confused deputy attack
• CVE-2025-0238 (bmo#1915535) Use-after-free when breaking lines in text
• CVE-2025-0239 (bmo#1929156) Alt-Svc ALPN validation failure when redirected
• CVE-2025-0240 (bmo#1929623) Compartment mismatch when parsing JavaScript JSON module
• CVE-2025-0241 (bmo#1933023) Memory corruption when using JavaScript Text Segmentation
• CVE-2025-0242 (bmo#1874523, bmo#1926454, bmo#1931873, bmo#1932169) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
• CVE-2025-0243 (bmo#1827142, bmo#1932783) Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6

Other fixes:

• fixed: New mail notification was not hidden after reading the new message (bmo#1920077)
• fixed: New mail notification could show for the wrong folder, causing repeated alerts (bmo#1926462)
• fixed: macOS shortcut CMD+1 did not restore the main window when it was minimized (bmo#1857953)
• fixed: Clicking the context menu 'Reply' button resulted in 'Reply-All' (bmo#1935883)
• fixed: Switching from 'All', 'Unread', and 'Threads with unread' did not work (bmo#1921618)
• fixed: Downloading message headers from a newsgroup could cause a hang (bmo#1931661)
• fixed: Message list performance slow when many updates happened at once (bmo#1933104)
• fixed: 'mailto:' links did not apply the compose format of the current identity (bmo#550414)
• fixed: Authentication failure of AUTH PLAIN or AUTH LOGIN did not fall back to USERPASS (bmo#1928026)

Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. (CVE-2025-0237, CVE-2025-0239, CVE-2025-0240, CVE-2025-0242, CVE-2025-0243, CVE-2025-0247)

Irvan Kurniawan discovered that Firefox incorrectly handled memory when breaking lines in text, leading to a use-after-free vulnerability. An attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2025-0238)

Nils Bars discovered that Firefox incorrectly handled memory when using JavaScript Text Segmentation. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-0241)