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Fencer Intel
high 7.5

CVE-2015-4498 json

The add-on installation feature in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to bypass an in…

published 11y ago modified 4mo ago also EUVD-2015-4518

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

The add-on installation feature in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to bypass an intended user-confirmation requirement by constructing a crafted data: URL and triggering navigation to an arbitrary http: or https: URL at a certain early point in the installation process.

Patch / fix

  • firefox Ubuntu 14.04 LTS 40.0.3+build1-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2015-4498

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 5 38.2.1-1.el5_11
  • firefox RHEL 6 38.2.1-1.el6_7
  • firefox RHEL 7 38.2.1-1.el7_1

red hat advisories RHSA-2015:1693

  • MozillaFirefox SLES 11 SP2-LTSS, SLES 11 SP1-TERADATA, SLES 11 SP1-LTSS 38.2.1esr-17.1
  • mozilla-nss SLES for SAP 12, SLES 12, SLED 12 +1 more 3.19.2.0-26.2
  • MozillaFirefox SLES for SAP 12, SLES 12, SLED 12 +1 more 38.2.1esr-45.1
  • MozillaFirefox-branding-SLE SLES for SAP 12, SLES 12, SLED 12 31.0-14.1

suse advisories SUSE-SU-2015:1504-1SUSE-SU-2015:1476-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1

Is CVE-2015-4498 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2015-4498 updated cvss 5.1

Mozilla: Add-on notification bypass through data URLs (MFSA 2015-95)

  • Red Hat Enterprise Linux (v. 5 server) firefox 38.2.1-1.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Client Optional (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 38.2.1-1.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 38.2.1-1.el6_7
    +9 more products
    Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Server (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Server (v. 7) firefox 38.2.1-1.el7_1, firefox 38.2.1-1.ael7b_1 Red Hat Enterprise Linux Server Optional (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Server Optional (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Workstation (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Workstation (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 38.2.1-1.el7_1
    fixed: vendor fix RHSA-2015:1693

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

Exploit prediction

2.68% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel 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.