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Fencer Vulns
high 7.5

CVE-2024-8900 json

An attacker could write data to the user's clipboard, bypassing the user prompt, during a certain sequence of navigational events.

published 2024-09-17 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-49464

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

An attacker could write data to the user's clipboard, bypassing the user prompt, during a certain sequence of navigational events. This vulnerability affects Firefox < 129, Firefox ESR < 128.3, and Thunderbird < 128.3.

Patch / fix

  • Mozilla Firefox 129
  • Mozilla Firefox ESR 128.3
  • Mozilla Thunderbird 128.3
  • thunderbird Debian 14, Debian 13 1:128.3.0esr-1

debian advisories DEBIAN-CVE-2024-8900

  • firefox Ubuntu 20.04 LTS 129.0.1+build1-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2024-8900

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • firefox RHEL 8 128.3.0-1.el8_10
  • firefox RHEL 8.8 EUS 128.3.0-1.el8_8
  • firefox RHEL 7 ELS 128.3.0-1.el7_9
  • firefox RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 128.3.0-1.el8_4
  • firefox RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 128.3.0-1.el8_6
  • firefox RHEL 8.2 AUS 128.3.0-1.el8_2
  • firefox RHEL 9.2 EUS 128.3.0-1.el9_2
  • firefox-x11 RHEL 9.2 EUS 128.3.0-1.el9_2

red hat advisories RHSA-2024:7842RHSA-2024:7700RHSA-2024:7702RHSA-2024:7703RHSA-2024:7704RHSA-2024:7646

  • MozillaThunderbird SLE Workstation Extension 15 SP6, SLE Workstation Extension 15 SP5, SLE Module for Package Hub 15 SP6 +3 more 128.3.0-150200.8.182.1
  • MozillaFirefox SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +12 more 128.3.1-150200.152.155.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 128.3.1-112.231.1
  • MozillaFirefox SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +12 more 128.3.0-150200.152.152.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 128.3.0-112.228.1

suse advisories SUSE-SU-2024:3629-1SUSE-SU-2024:3614-1SUSE-SU-2024:3603-1SUSE-SU-2024:3519-1SUSE-SU-2024:3518-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • mozjs128 openSUSE Tumbleweed 128.3.1-1.1
  • MozillaThunderbird openSUSE Tumbleweed 128.3.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:14397-1openSUSE-SU-2024:14394-1

  • firefox AlmaLinux 8 128.3.0-1.el8_10.alma.1

almalinux advisories ALSA-2024:7700

  • firefox Rocky Linux 8 128.3.0-1.el8_10

rocky linux advisories RLSA-2024:7700

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-8900 updated cvss 7.5

firefox: Clipboard write permission bypass

  • Red Hat Enterprise Linux 6 firefox
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 firefox, firefox-x11, firefox-flatpak-container
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 128.3.0-1.el8_10
    fixed: vendor fix RHSA-2024:7700
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 128.3.0-1.el8_2
    fixed: vendor fix RHSA-2024:7646
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 128.3.0-1.el8_4
    fixed: vendor fix RHSA-2024:7703
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 128.3.0-1.el8_6
    fixed: vendor fix RHSA-2024:7704
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 128.3.0-1.el8_4
    fixed: vendor fix RHSA-2024:7703
  • Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox 128.3.0-1.el8_6
    fixed: vendor fix RHSA-2024:7704
show 7 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox 128.3.0-1.el9_0
    fixed: vendor fix RHSA-2024:7621
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox 128.3.0-1.el8_8
    fixed: vendor fix RHSA-2024:7842
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox 128.3.0-1.el9_2, firefox-x11 128.3.0-1.el9_2
    fixed: vendor fix RHSA-2024:7622
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 128.3.0-1.el8_4
    fixed: vendor fix RHSA-2024:7703
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox 128.3.0-1.el8_6
    fixed: vendor fix RHSA-2024:7704
  • Red Hat Enterprise Linux Server (v. 7 ELS) firefox 128.3.0-1.el7_9
    fixed: vendor fix RHSA-2024:7702
  • Red Hat Enterprise Linux 10 firefox
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

  • Mozilla Firefox
  • Mozilla Firefox ESR
  • Mozilla Thunderbird

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.