Skip to content
Noroxi
NVD / CVE Program· CNA mozilla

CVE-2024-3863: The executable file warning was not presented when downloading .xrm-ms files.

Noroxi assessment

Priority: Monitor (action score 39/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.81% (FIRST EPSS); higher than 56.7% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: MozillaFirefox (openSUSE:Leap 15.5) 115.10.0-150200.152.134.1, 115.11.0-150200.152.137.2; MozillaThunderbird (openSUSE:Leap 15.5) 115.10.1-150200.8.157.1; MozillaFirefox (openSUSE:Tumbleweed) 125.0.2-1.1.

Low priority for now. Upgrade to MozillaFirefox (openSUSE:Leap 15.5) 115.10.0-150200.152.134.1, 115.11.0-150200.152.137.2; MozillaThunderbird (openSUSE:Leap 15.5) 115.10.1-150200.8.157.1; MozillaFirefox (openSUSE:Tumbleweed) 125.0.2-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Apr 16, 2024
Updated
Jun 17, 2026
EPSS
0.8% · 56th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-3863

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for mozilla records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mozillafirefox
mozillathunderbird

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • mozilla firefoxbefore 115.10.0
  • mozilla firefoxbefore 125.0
  • mozilla thunderbirdbefore 115.10

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.

  • Mozilla Firefox

    • unspecified and later · before 125affected

  • Mozilla Firefox ESR

    • unspecified and later · before 115.10affected

  • Mozilla Thunderbird

    • unspecified and later · before 115.10affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
openSUSE:Leap 15.5MozillaFirefoxbefore 115.10.0-150200.152.134.1115.10.0-150200.152.134.1
openSUSE:Leap 15.5MozillaFirefoxbefore 115.11.0-150200.152.137.2115.11.0-150200.152.137.2
openSUSE:Leap 15.5MozillaThunderbirdbefore 115.10.1-150200.8.157.1115.10.1-150200.8.157.1
openSUSE:TumbleweedMozillaFirefoxbefore 125.0.2-1.1125.0.2-1.1
openSUSE:TumbleweedMozillaThunderbirdbefore 115.10.1-1.1115.10.1-1.1
SUSE:Linux Enterprise Module for Desktop Applications 15 SP5MozillaFirefoxbefore 115.11.0-150200.152.137.2115.11.0-150200.152.137.2
SUSE:Linux Enterprise Module for Desktop Applications 15 SP5MozillaFirefoxbefore 115.10.0-150200.152.134.1115.10.0-150200.152.134.1
SUSE:Linux Enterprise Module for Package Hub 15 SP5MozillaThunderbirdbefore 115.10.1-150200.8.157.1115.10.1-150200.8.157.1
SUSE:Linux Enterprise Software Development Kit 12 SP5MozillaFirefoxbefore 115.11.0-112.212.1115.11.0-112.212.1
SUSE:Linux Enterprise Software Development Kit 12 SP5MozillaFirefoxbefore 115.10.0-112.209.1115.10.0-112.209.1

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV
    87Now
  • CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV
    86Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-3861Apr 16, 2024 · If an AlignedBuffer were assigned to itself, the subsequent self-move could result in an incorrect reference count and later use-after-free.
    16Monitor
  • ← EarlierCVE-2024-3862Apr 16, 2024 · The MarkStack assignment operator, part of the JavaScript engine, could access uninitialized memory if it were used in a self-assignment.
    21Monitor
  • Later →CVE-2024-3864Apr 16, 2024 · Memory safety bug present in Firefox 124, Firefox ESR 115.9, and Thunderbird 115.9.
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
opensuse:MozillaFirefox115.10.0-150200.152.134.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:MozillaThunderbird115.10.1-150200.8.157.1 · openSUSE:Leap 15.5Package registry (OSV)
suse:MozillaFirefox115.10.0-112.209.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)
suse:MozillaFirefox115.10.0-150200.152.134.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP5Package registry (OSV)
suse:MozillaThunderbird115.10.1-150200.8.157.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2022-34482481 days apartAn attacker who could have convinced a user to drag and drop an image to a filesystem could have manipulated the resulting filename to conta
    35Monitor
  • CVE-2022-34483481 days apartAn attacker who could have convinced a user to drag and drop an image to a filesystem could have manipulated the resulting filename to conta
    35Monitor
  • CVE-2025-6435434 days apartSave as in Devtools could download files without sanitizing the extension
    32Monitor
  • CVE-2023-37208286 days apartWhen opening Diagcab files, Firefox did not warn the user that these files may contain malicious code.
    31Monitor
  • CVE-2022-45415481 days apartWhen downloading an HTML file, if the title of the page was formatted as a filename with a malicious extension, Firefox may have saved the f
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-434 · Unrestricted Upload of File with Dangerous Type

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records