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CVE-2024-9398· NVD / CVE Program· CNA mozilla

By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application whi

Noroxi assessment

Priority: Monitor (action score 21/100)

  • 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: 0.56% (FIRST EPSS).
  • 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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: firefox (AlmaLinux:8) 128.3.0-1.el8_10.alma.1; thunderbird (AlmaLinux:8) 128.3.0-1.el8_10.alma.1; thunderbird (AlmaLinux:9) 128.3.0-1.el9_4.alma.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to firefox (AlmaLinux:8) 128.3.0-1.el8_10.alma.1; thunderbird (AlmaLinux:8) 128.3.0-1.el8_10.alma.1; thunderbird (AlmaLinux:9) 128.3.0-1.el9_4.alma.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

By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Oct 1, 2024
Updated
Oct 8, 2026
EPSS
0.5% · 45th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.3
CNA · mozilla
5.3
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2024-9398

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

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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.

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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 128.3.0
  • mozilla firefoxbefore 131.0
  • mozilla thunderbirdbefore 128.3
  • mozilla thunderbird129.0

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 131affected

  • Mozilla Firefox ESR

    • unspecified and later · before 128.3affected

  • Mozilla Thunderbird

    • unspecified and later · before 128.3affected
    • unspecified and later · before 131affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8firefoxbefore 128.3.0-1.el8_10.alma.1128.3.0-1.el8_10.alma.1
AlmaLinux:8thunderbirdbefore 128.3.0-1.el8_10.alma.1128.3.0-1.el8_10.alma.1
AlmaLinux:9thunderbirdbefore 128.3.0-1.el9_4.alma.1128.3.0-1.el9_4.alma.1
Debian:13thunderbirdbefore 1:128.3.0esr-11:128.3.0esr-1
openSUSE:TumbleweedMozillaFirefoxbefore 131.0-1.1131.0-1.1
openSUSE:TumbleweedMozillaThunderbirdbefore 128.3.1-1.1128.3.1-1.1
openSUSE:Tumbleweedmozjs128before 128.3.1-1.1128.3.1-1.1
Red Hat:enterprise_linux:8::appstreamfirefoxbefore 0:128.3.0-1.el8_100:128.3.0-1.el8_10
Red Hat:enterprise_linux:8::appstreamfirefox-debuginfobefore 0:128.3.0-1.el8_100:128.3.0-1.el8_10
Red Hat:enterprise_linux:8::appstreamfirefox-debugsourcebefore 0:128.3.0-1.el8_100:128.3.0-1.el8_10
Red Hat:enterprise_linux:8::appstreamthunderbirdbefore 0:128.3.0-1.el8_100:128.3.0-1.el8_10
Red Hat:enterprise_linux:8::appstreamthunderbird-debuginfobefore 0:128.3.0-1.el8_100:128.3.0-1.el8_10
Red Hat:enterprise_linux:8::appstreamthunderbird-debugsourcebefore 0:128.3.0-1.el8_100:128.3.0-1.el8_10
Red Hat:enterprise_linux:9::appstreamthunderbirdbefore 0:128.3.0-1.el9_40:128.3.0-1.el9_4
Red Hat:enterprise_linux:9::appstreamthunderbird-debuginfobefore 0:128.3.0-1.el9_40:128.3.0-1.el9_4
Red Hat:enterprise_linux:9::appstreamthunderbird-debugsourcebefore 0:128.3.0-1.el9_40:128.3.0-1.el9_4
Red Hat:rhel_aus:8.2::appstreamfirefoxbefore 0:128.3.0-1.el8_20:128.3.0-1.el8_2
Red Hat:rhel_aus:8.2::appstreamfirefox-debuginfobefore 0:128.3.0-1.el8_20:128.3.0-1.el8_2
Red Hat:rhel_aus:8.2::appstreamfirefox-debugsourcebefore 0:128.3.0-1.el8_20:128.3.0-1.el8_2
Red Hat:rhel_aus:8.2::appstreamthunderbirdbefore 0:128.3.0-1.el8_20:128.3.0-1.el8_2
Red Hat:rhel_aus:8.2::appstreamthunderbird-debuginfobefore 0:128.3.0-1.el8_20:128.3.0-1.el8_2
Red Hat:rhel_aus:8.2::appstreamthunderbird-debugsourcebefore 0:128.3.0-1.el8_20:128.3.0-1.el8_2
Red Hat:rhel_aus:8.4::appstreamfirefoxbefore 0:128.3.0-1.el8_40:128.3.0-1.el8_4
Red Hat:rhel_aus:8.4::appstreamfirefox-debuginfobefore 0:128.3.0-1.el8_40:128.3.0-1.el8_4

+41

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-2024-9402Oct 1, 2024 · Memory safety bugs present in Firefox 130, Firefox ESR 128.2, and Thunderbird 128.2.
    39Monitor
  • ← EarlierCVE-2024-9403Oct 1, 2024 · Memory safety bugs present in Firefox 130.
    29Monitor
  • Later →CVE-2024-9680Oct 9, 2024 · An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines.KEV
    76This week

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
almalinux:firefox128.3.0-1.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:thunderbird128.3.0-1.el9_4.alma.1 · AlmaLinux:9Package registry (OSV)
debian:thunderbird1:128.3.0esr-1 · Debian:13Package registry (OSV)
opensuse:MozillaFirefox128.3.0-150200.152.152.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:MozillaThunderbird128.3.0-150200.8.182.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:mozjs128128.3.1-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:firefox0:128.3.0-1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:firefox-debuginfo0:128.3.0-1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:firefox-debugsource0:128.3.0-1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:firefox-x110:128.3.0-1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:thunderbird0:128.3.0-1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:thunderbird-debuginfo0:128.3.0-1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:thunderbird-debugsource0:128.3.0-1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:firefox0:128.3.0-1.el8_10 · Rocky Linux:8Package registry (OSV)
rocky linux:thunderbird0:128.3.0-1.el8_10 · Rocky Linux:8Package registry (OSV)
suse:MozillaFirefox128.3.0-112.228.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)
suse:MozillaFirefox128.3.0-150200.152.152.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP5Package registry (OSV)
suse:MozillaThunderbird128.3.0-150200.8.182.1 · 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-2024-1046328 days apartVideo frames could have been leaked between origins in some situations.
    26Monitor
  • CVE-2023-5388196 days apartNSS was susceptible to a timing side-channel attack when performing RSA decryption.
    26Monitor
  • CVE-2023-25728487 days apartThe <code>Content-Security-Policy-Report-Only</code> header could allow an attacker to leak a child iframe's unredacted URI when interaction
    26Monitor
  • CVE-2023-25741487 days apartWhen dragging and dropping an image cross-origin, the image's size could potentially be leaked.
    26Monitor
  • CVE-2023-5722342 days apartUsing iterative requests an attacker was able to learn the size of an opaque response, as well as the contents of a server-supplied Vary hea
    21Monitor
  • CVE-2024-5697112 days apartA website was able to detect when a user took a screenshot of a page using the built-in Screenshot functionality in Firefox.
    17Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-203 · Observable Discrepancy

CVSS vector

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

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records