CVE-2015-4495
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…
- 8.8HighCVSS base score
- 68.6%Exploitation in 30 daysEPSS · top 0.7% of all CVEs
- YesKnown exploitedin CISA's KEV since 25 May 2022
- 2Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Mozilla Firefox Security Feature Bypass Vulnerability.
- Added
- 25 May 2022
- Fix due (US federal)
- 15 Jun 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 25 May 2022.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and an Exploit-DB entry for it. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits3
Metasploit modules1 module
- Firefox PDF.js Browser File Theft (Metasploit module) (opens in a new tab)
auxiliary/gather/firefox_pdfjs_file_theftRank normal
Exploit-DB1 entry
- Mozilla Firefox < 39.03 - 'pdf.js' Same Origin Policy (Exploit-DB entry) (opens in a new tab)
EDB-ID 37772local, multiplepublished 15 Aug 2015Not verified
References tagged exploit1 reference
- 37772 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mozilla
- 59 days later
· 59 days later
Published
- 7 years later
· 7 years later
Added to CISA KEV
Known exploited in the wild
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 68.6% · top 0.7% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
n/a
- affected n/a
References
References18
- https://bugzilla.mozilla.org/show_bug.cgi?id=1179262 (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SU-2015:1379 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- SUSE-SU-2015:1380 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 76249 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 37772 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- RHSA-2015:1581 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- GLSA-201512-10 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- openSUSE-SU-2015:1389 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- USN-2707-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SU-2015:1528 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1178058 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://blog.mozilla.org/security/2015/08/06/firefox-exploit-found-in-the-wild/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.mozilla.org/security/announce/2015/mfsa2015-78.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1033216 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- SUSE-SU-2015:1449 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2015:1390 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-4495 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2015-4515 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2015-4495)Record last updated .