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CVE-2024-3863

The executable file warning was not presented when downloading .xrm-ms files. *Note: This issue...

9.8 Critical

The executable file warning was not presented when downloading .xrm-ms files.
Note: This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.81%Up 0.8 points since Apr 17, 2024
90%50%10%1%

What each source reports

NVD Score used 9.8

The executable file warning was not presented when downloading .xrm-ms files.
Note: This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Record
CVE-2024-3863
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-434
Updated
2026-11-04
CVE List 9.8

The executable file warning was not presented when downloading .xrm-ms files.
Note: This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Record
CVE-2024-3863
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-434
Updated
2026-11-04
EUVDEUVD-2024-32431 9.8

The executable file warning was not presented when downloading .xrm-ms files.
Note: This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Record
EUVD-2024-32431
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-04
GitHub AdvisoriesGHSA-3vhm-v3w9-8mr8 9.8

The executable file warning was not presented when downloading .xrm-ms files. *Note: This issue...

The executable file warning was not presented when downloading .xrm-ms files.
Note: This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 125 and Firefox ESR < 115.10.

Record
GHSA-3vhm-v3w9-8mr8
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-434
Updated
2026-11-02
OSVopenSUSE-SU-2024:13884-1 No score

MozillaThunderbird-115.10.1-1.1 on GA media

These are all security issues fixed in the MozillaThunderbird-115.10.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:13884-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:13907-1 No score

MozillaFirefox-125.0.2-1.1 on GA media

These are all security issues fixed in the MozillaFirefox-125.0.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:13907-1
Updated
2026-11-02
Show 6 moreShow less
OSVopenSUSE-SU-2024:14572-1 No score

firefox-esr-128.5.1-1.1 on GA media

These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14572-1
Updated
2026-11-02
OSVSUSE-SU-2024:1319-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

Update to Firefox Extended Support Release 115.10.0 ESR (MSFA 2024-19) (bsc#1222535):

  • CVE-2024-3852: GetBoundName in the JIT returned the wrong object
  • CVE-2024-3854: Out-of-bounds-read after mis-optimized switch statement
  • CVE-2024-3857: Incorrect JITting of arguments led to use-after-free during garbage collection
  • CVE-2024-2609: Permission prompt input delay could expire when not in focus
  • CVE-2024-3859: Integer-overflow led to out-of-bounds-read in the OpenType sanitizer
  • CVE-2024-3861: Potential use-after-free due to AlignedBuffer self-move
  • CVE-2024-3863: Download Protections were bypassed by .xrm-ms files on Windows
  • CVE-2024-3302: Denial of Service using HTTP/2 CONTINUATION frames
  • CVE-2024-3864: Memory safety bug fixed in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10
Record
SUSE-SU-2024:1319-1
Updated
2026-11-02
OSVSUSE-SU-2024:1350-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

Update to Firefox Extended Support Release 115.10.0 ESR (MSFA 2024-19) (bsc#1222535):

  • CVE-2024-3852: GetBoundName in the JIT returned the wrong object
  • CVE-2024-3854: Out-of-bounds-read after mis-optimized switch statement
  • CVE-2024-3857: Incorrect JITting of arguments led to use-after-free during garbage collection
  • CVE-2024-2609: Permission prompt input delay could expire when not in focus
  • CVE-2024-3859: Integer-overflow led to out-of-bounds-read in the OpenType sanitizer
  • CVE-2024-3861: Potential use-after-free due to AlignedBuffer self-move
  • CVE-2024-3863: Download Protections were bypassed by .xrm-ms files on Windows
  • CVE-2024-3302: Denial of Service using HTTP/2 CONTINUATION frames
  • CVE-2024-3864: Memory safety bug fixed in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10
Record
SUSE-SU-2024:1350-1
Updated
2026-11-02
OSVSUSE-SU-2024:1437-1 No score

Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues:

Update to Mozilla Thunderbird 115.10.1

Security fixes (MFSA 2024-20) (bsc#1222535):

  • CVE-2024-3852: GetBoundName in the JIT returned the wrong object (bmo#1883542)
  • CVE-2024-3854: Out-of-bounds-read after mis-optimized switch statement (bmo#1884552)
  • CVE-2024-3857: Incorrect JITting of arguments led to use-after-free during garbage collection (bmo#1886683)
  • CVE-2024-2609: Permission prompt input delay could expire when not in focus (bmo#1866100)
  • CVE-2024-3859: Integer-overflow led to out-of-bounds-read in the OpenType sanitizer (bmo#1874489)
  • CVE-2024-3861: Potential use-after-free due to AlignedBuffer self-move (bmo#1883158)
  • CVE-2024-3863: Download Protections were bypassed by .xrm-ms files on Windows (bmo#1885855)
  • CVE-2024-3302: Denial of Service using HTTP/2 CONTINUATION frames (bmo#1881183, https://kb.cert.org/vuls/id/421644)
  • CVE-2024-3864: Memory safety bug fixed in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10 (bmo#1888333)

Other Fixes:

  • fixed: Thunderbird processes did not exit cleanly; user intervention was required via task manager (bmo#1891889)
  • unresolved: After changing password on an IMAP account, the account could become locked due to too many failed login attempts (bmo#1862111)
  • fixed: Creating a tag in General Settings with a number as the tag name did not work (bmo#1881124)
  • fixed: Quick Filter button selections did not persist after restart (bmo#1847265)
  • fixed: Collapsing and expanding message list headers sometimes caused header to scroll out of view (bmo#1862197)
  • fixed: Single message with no children inside a parent thread sometimes displayed incorrectly as a thread with a duplicate of itself as its child (bmo#1427546)
  • fixed: 'Get selected messages' menu items did not work (bmo#1867091)
  • fixed: 'Download and Sync Messages' dialog was too short when using Russian locale, obscuring OK button (bmo#1881795)
  • fixed: After changing password on an IMAP account, the account could become locked due to too many failed login attempts (bmo#1862111)
  • fixed: Retrieving multiline POP3 message from server failed if message chunk ended in newline instead of carriage return and newline (bmo#1883760)
  • fixed: IMAP, POP3, and SMTP Exchange autoconfiguration did not support encryption configuration (bmo#1876992)
  • fixed: Non-empty address book search bar interfered with displaying/editing contacts (bmo#1833031)
  • fixed: Deleting attendees from 'Invite Attendees' view removed attendees from view, but not from invite (bmo#1874450)
  • fixed: Splitter arrow between task list and task description did not behave as expected (bmo#1889562)
  • fixed: Performance improvements and code cleanup (bmo#1878257,bmo#1883550)
  • fixed: Security fixes
  • unresolved: Thunderbird processes did not exit cleanly; user intervention was required via task manager (bmo#1891889)
Record
SUSE-SU-2024:1437-1
Updated
2026-11-02
OSVSUSE-SU-2024:1676-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

Update to version 115.11.0 ESR (bsc#1224056):

  • CVE-2024-4367: Arbitrary JavaScript execution in PDF.js
  • CVE-2024-4767: IndexedDB files retained in private browsing mode
  • CVE-2024-4768: Potential permissions request bypass via clickjacking
  • CVE-2024-4769: Cross-origin responses could be distinguished between script and non-script content-types
  • CVE-2024-4770: Use-after-free could occur when printing to PDF
  • CVE-2024-4777: Memory safety bugs fixed in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11
Record
SUSE-SU-2024:1676-1
Updated
2026-11-02
OSVSUSE-SU-2024:1770-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

Update to version 115.11.0 ESR (bsc#1224056):

  • CVE-2024-4367: Arbitrary JavaScript execution in PDF.js
  • CVE-2024-4767: IndexedDB files retained in private browsing mode
  • CVE-2024-4768: Potential permissions request bypass via clickjacking
  • CVE-2024-4769: Cross-origin responses could be distinguished between script and non-script content-types
  • CVE-2024-4770: Use-after-free could occur when printing to PDF
  • CVE-2024-4777: Memory safety bugs fixed in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11
Record
SUSE-SU-2024:1770-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
MozillaFirefox
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 9 CVEs
before 115.10.0-112.209.1
115.10.0-112.209.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 9 CVEs
before 115.10.0-112.209.1
115.10.0-112.209.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 9 CVEs
before 115.10.0-112.209.1
115.10.0-112.209.1
MozillaFirefox
SUSE:Linux Enterprise Module for Desktop Applications 15 SP5
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP2-LTSS
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP3-LTSS
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
Show 30 moreShow less
Affected packages
PackageAffectedFixed
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP4-LTSS
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP2
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP3
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
SUSE:Enterprise Storage 7.1
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaFirefox
openSUSE:Leap 15.5
From an advisory covering 9 CVEs
before 115.10.0-150200.152.134.1
115.10.0-150200.152.134.1
MozillaThunderbird
SUSE:Linux Enterprise Module for Package Hub 15 SP5
From an advisory covering 9 CVEs
before 115.10.1-150200.8.157.1
115.10.1-150200.8.157.1
MozillaThunderbird
SUSE:Linux Enterprise Workstation Extension 15 SP5
From an advisory covering 9 CVEs
before 115.10.1-150200.8.157.1
115.10.1-150200.8.157.1
MozillaThunderbird
openSUSE:Leap 15.5
From an advisory covering 9 CVEs
before 115.10.1-150200.8.157.1
115.10.1-150200.8.157.1
MozillaFirefox
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 15 CVEs
before 115.11.0-112.212.1
115.11.0-112.212.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 15 CVEs
before 115.11.0-112.212.1
115.11.0-112.212.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 15 CVEs
before 115.11.0-112.212.1
115.11.0-112.212.1
MozillaFirefox
SUSE:Linux Enterprise Module for Desktop Applications 15 SP5
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise Module for Desktop Applications 15 SP6
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP2-LTSS
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP3-LTSS
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP4-LTSS
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP2
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP3
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
SUSE:Enterprise Storage 7.1
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
openSUSE:Leap 15.5
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaFirefox
openSUSE:Leap 15.6
From an advisory covering 15 CVEs
before 115.11.0-150200.152.137.2
115.11.0-150200.152.137.2
MozillaThunderbird
openSUSE:Tumbleweed
From an advisory covering 9 CVEs
before 115.10.1-1.1
115.10.1-1.1
MozillaFirefox
openSUSE:Tumbleweed
From an advisory covering 15 CVEs
before 125.0.2-1.1
125.0.2-1.1
firefox-esr
openSUSE:Tumbleweed
From an advisory covering 1860 CVEs
before 128.5.1-1.1
128.5.1-1.1

History

History
RecordedChangedSources
affected, factsCVE List, EUVD, NVD
factsCVE List, EUVD
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-3863 is a critical vulnerability (CVSS 9.8) in Mozilla Firefox, published April 16, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.81%, the 57th percentile. No source names a fixed version.

References

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