CVE-2015-4495
HighExploitedPublic exploitThe 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 bypass the Same Origin Policy, and read arbitrary files or gain privileges, via vectors involving crafted JavaScript code and a native setter, as…
Published Aug 8, 2015 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2015-4495, SUSE-SU-2015:1379-1, SUSE-SU-2015:1380-1, UBUNTU-CVE-2015-4495, USN-2707-1
Key Facts
Patch immediately- CVE-2015-4495 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Firefox (Mozilla), Linux Enterprise Debuginfo (Suse), Ubuntu Linux (Canonical) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 5, 2015. Public exploit code is available.
- EPSS estimates a 69% probability of exploitation in the next 30 days.
- Fixed versions are available, including Firefox 0:38.1.1-1.ael7b_1, Firefox 0:38.1.1-1.el5_11, Firefox 0:38.1.1-1.el6_7.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
69%
Higher than 99.3% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2015-4495 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
The 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 bypass the Same Origin Policy, and read arbitrary files or gain privileges, via vectors involving crafted JavaScript code and a native setter, as exploited in the wild in August 2015.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 25, 2022 | Jun 15, 2022 | Not reported |
| Industry KEV feed | Aug 5, 2015 | Jun 15, 2022 | Not reported |
| CIRCL KEV | May 25, 2022 | Jun 15, 2022 | Not reported |
| ENISA EUVD | May 25, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
302 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FirefoxMozilla | See advisory | 39.0.3 |
| Linux Enterprise DebuginfoSuse | 11-sp1, 11-sp2, 11-sp3, 11-sp4 | n/a |
| Ubuntu LinuxCanonical | 12.04, 14.04, 15.04 | n/a |
| Firefox OSMozilla | See advisory | 2.2 |
| OpensuseOpensuse | 13.1, 13.2 | n/a |
Patched Releases
Firefox
0:38.1.1-1.ael7b_1, 0:38.1.1-1.el5_11, 0:38.1.1-1.el6_7, 38.1.1-1.0.1.el5_11, 38.1.1-1.0.1.el6_7, 38.1.1-1.0.1.el7_1, 39.0.3+build2-0ubuntu0.14.04.1, 38.1.1, 39.0.3
firefox-esr
128.5.1-1.1
firefox-esr-branding-upstream
128.5.1-1.1
firefox-esr-translations-common
128.5.1-1.1
firefox-esr-translations-other
128.5.1-1.1
firefox-gcc47
4.7.2_20130108-0.37.2
firefox-libgcc_s1
4.7.2_20130108-0.37.2
firefox-libstdc++6
4.7.2_20130108-0.37.2
libfreebl3
3.19.2.0-0.16.1, 3.19.2.0-0.7.1, 3.19.2.0-26.2
libfreebl3-32bit
3.19.2.0-0.16.1, 3.19.2.0-0.7.1, 3.19.2.0-26.2
libfreebl3-hmac
3.19.2.0-26.2
libfreebl3-hmac-32bit
3.19.2.0-26.2
libfreebl3-x86
3.19.2.0-0.16.1
libsoftokn3
3.19.2.0-0.16.1, 3.19.2.0-26.2
libsoftokn3-32bit
3.19.2.0-0.16.1, 3.19.2.0-26.2
libsoftokn3-hmac
3.19.2.0-26.2
libsoftokn3-hmac-32bit
3.19.2.0-26.2
libsoftokn3-x86
3.19.2.0-0.16.1
Firefox OS
2.2
mozilla-nss
3.19.2.0-0.16.1, 3.19.2.0-0.7.1, 3.19.2.0-26.2
mozilla-nss-32bit
3.19.2.0-0.16.1, 3.19.2.0-0.7.1, 3.19.2.0-26.2
mozilla-nss-certs
3.19.2.0-26.2
mozilla-nss-certs-32bit
3.19.2.0-26.2
mozilla-nss-devel
3.19.2.0-0.16.1, 3.19.2.0-0.7.1, 3.19.2.0-26.2
mozilla-nss-tools
3.19.2.0-0.16.1, 3.19.2.0-0.7.1, 3.19.2.0-26.2
Timeline
Added to Industry KEV feed
Aug 5, 2015
Publicly disclosed
Aug 8, 2015
Added to CISA KEV
May 25, 2022
Added to CIRCL KEV
May 25, 2022
Added to ENISA EUVD
May 25, 2022
Last updated
Aug 4, 2026
Weakness Type
- CWE-346 Origin Validation Error
References
- advisorySUSE-SU-2015:1379
- advisorySUSE-SU-2015:1380
- advisoryopenSUSE-SU-2015:1389
- advisoryopenSUSE-SU-2015:1390
- advisorySUSE-SU-2015:1449
FAQ
Common Questions.
The 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 bypass the Same Origin Policy, and read arbitrary files or gain privileges, via vectors involving crafted JavaScript code and a native setter, as exploited in the wild in August 2015.
Affected: Firefox (Mozilla); Linux Enterprise Debuginfo (Suse) versions 11-sp1, 11-sp2, 11-sp3, 11-sp4; Ubuntu Linux (Canonical) versions 12.04, 14.04, 15.04, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 5, 2015.
Yes. It was added on May 25, 2022 with a federal remediation due date of Jun 15, 2022.
Public exploit code is available.
Fixed versions are available, including Firefox 0:38.1.1-1.ael7b_1, Firefox 0:38.1.1-1.el5_11, Firefox 0:38.1.1-1.el6_7.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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