CVE-2016-5251
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted...
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
4.3
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
- Record
CVE-2016-5251- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
- Record
CVE-2016-5251- Updated
- 2026-11-02
EUVDEUVD-2016-6202 No score
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
- Record
EUVD-2016-6202- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-p834-7563-6j4f
4.3
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted...
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
- Record
GHSA-p834-7563-6j4f- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2016-5251
4.3
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
- Record
UBUNTU-CVE-2016-5251- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10071-1 No score
MozillaFirefox-50.1.0-1.1 on GA media
These are all security issues fixed in the MozillaFirefox-50.1.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10071-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:14572-1 No score
firefox-esr-128.5.1-1.1 on GA media
These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:14572-1- Updated
- 2026-11-02
OSVUSN-3044-1 No score
firefox vulnerabilities
Gustavo Grieco discovered an out-of-bounds read during XML parsing in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or obtain sensitive information. (CVE-2016-0718)
Toni Huttunen discovered that once a favicon is requested from a site, the remote server can keep the network connection open even after the page is closed. A remote attacked could potentially exploit this to track users, resulting in information disclosure. (CVE-2016-2830)
Christian Holler, Tyson Smith, Boris Zbarsky, Byron Campen, Julian Seward, Carsten Book, Gary Kwong, Jesse Ruderman, Andrew McCreight, and Phil Ringnalda discovered multiple memory safety issues in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-2835, CVE-2016-2836)
A buffer overflow was discovered in the ClearKey Content Decryption Module (CDM) during video playback. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via plugin process crash, or, in combination with another vulnerability to escape the GMP sandbox, execute arbitrary code. (CVE-2016-2837)
Atte Kettunen discovered a buffer overflow when rendering SVG content in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-2838)
Bert Massop discovered a crash in Cairo with version 0.10 of FFmpeg. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to execute arbitrary code. (CVE-2016-2839)
Catalin Dumitru discovered that URLs of resources loaded after a navigation start could be leaked to the following page via the Resource Timing API. An attacker could potentially exploit this to obtain sensitive information. (CVE-2016-5250)
Firas Salem discovered an issue with non-ASCII and emoji characters in data: URLs. An attacker could potentially exploit this to spoof the addressbar contents. (CVE-2016-5251)
Georg Koppen discovered a stack buffer underflow during 2D graphics rendering in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5252)
Abhishek Arya discovered a use-after-free when the alt key is used with top-level menus. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5254)
Jukka Jylänki discovered a crash during garbage collection. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to execute arbitrary code. (CVE-2016-5255)
Looben Yang discovered a use-after-free in WebRTC. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5258)
Looben Yang discovered a use-after-free when working with nested sync events in service workers. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5259)
Mike Kaply discovered that plain-text passwords can be stored in session restore if an input field type is changed from "password" to "text" during a session, leading to information disclosure. (CVE-2016-5260)
Samuel Groß discovered an integer overflow in WebSockets during data buffering in some…
- Record
USN-3044-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
firefoxUbuntu:14.04:LTS |
before 48.0+build2-0ubuntu0.14.04.1, plus listed versions 24.0+build1-0ubuntu125.0+build3-0ubuntu0.13.10.128.0~b2+build1-0ubuntu228.0+build1-0ubuntu128.0+build2-0ubuntu1 Show 37 moreShow less28.0+build2-0ubuntu229.0+build1-0ubuntu0.14.04.230.0+build1-0ubuntu0.14.04.331.0+build1-0ubuntu0.14.04.132.0+build1-0ubuntu0.14.04.132.0.3+build1-0ubuntu0.14.04.133.0+build2-0ubuntu0.14.04.134.0+build2-0ubuntu0.14.04.135.0+build3-0ubuntu0.14.04.235.0.1+build1-0ubuntu0.14.04.136.0+build2-0ubuntu0.14.04.436.0.1+build2-0ubuntu0.14.04.136.0.4+build1-0ubuntu0.14.04.137.0+build2-0ubuntu0.14.04.137.0.1+build1-0ubuntu0.14.04.137.0.2+build1-0ubuntu0.14.04.138.0+build3-0ubuntu0.14.04.139.0+build5-0ubuntu0.14.04.139.0.3+build2-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.440.0.3+build1-0ubuntu0.14.04.141.0+build3-0ubuntu0.14.04.141.0.1+build2-0ubuntu0.14.04.141.0.2+build2-0ubuntu0.14.04.142.0+build2-0ubuntu0.14.04.143.0+build1-0ubuntu0.14.04.143.0.4+build3-0ubuntu0.14.04.144.0+build3-0ubuntu0.14.04.144.0.1+build2-0ubuntu0.14.04.144.0.2+build1-0ubuntu0.14.04.145.0+build2-0ubuntu0.14.04.145.0.1+build1-0ubuntu0.14.04.245.0.2+build1-0ubuntu0.14.04.146.0+build5-0ubuntu0.14.04.246.0.1+build1-0ubuntu0.14.04.347.0+build3-0ubuntu0.14.04.1 |
48.0+build2-0ubuntu0.14.04.1 |
firefoxUbuntu:16.04:LTS |
before 48.0+build2-0ubuntu0.16.04.1, plus listed versions 41.0.2+build2-0ubuntu142.0+build2-0ubuntu144.0+build3-0ubuntu244.0.1+build1-0ubuntu144.0.2+build1-0ubuntu1 Show 6 moreShow less45.0+build2-0ubuntu145.0.1+build1-0ubuntu145.0.2+build1-0ubuntu146.0+build5-0ubuntu0.16.04.246.0.1+build1-0ubuntu0.16.04.247.0+build3-0ubuntu0.16.04.1 |
48.0+build2-0ubuntu0.16.04.1 |
firefoxUbuntu:14.04:LTS From an advisory covering 22 CVEs |
before 48.0+build2-0ubuntu0.14.04.1, plus listed versions 24.0+build1-0ubuntu125.0+build3-0ubuntu0.13.10.128.0~b2+build1-0ubuntu228.0+build1-0ubuntu128.0+build2-0ubuntu1 Show 37 moreShow less28.0+build2-0ubuntu229.0+build1-0ubuntu0.14.04.230.0+build1-0ubuntu0.14.04.331.0+build1-0ubuntu0.14.04.132.0+build1-0ubuntu0.14.04.132.0.3+build1-0ubuntu0.14.04.133.0+build2-0ubuntu0.14.04.134.0+build2-0ubuntu0.14.04.135.0+build3-0ubuntu0.14.04.235.0.1+build1-0ubuntu0.14.04.136.0+build2-0ubuntu0.14.04.436.0.1+build2-0ubuntu0.14.04.136.0.4+build1-0ubuntu0.14.04.137.0+build2-0ubuntu0.14.04.137.0.1+build1-0ubuntu0.14.04.137.0.2+build1-0ubuntu0.14.04.138.0+build3-0ubuntu0.14.04.139.0+build5-0ubuntu0.14.04.139.0.3+build2-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.440.0.3+build1-0ubuntu0.14.04.141.0+build3-0ubuntu0.14.04.141.0.1+build2-0ubuntu0.14.04.141.0.2+build2-0ubuntu0.14.04.142.0+build2-0ubuntu0.14.04.143.0+build1-0ubuntu0.14.04.143.0.4+build3-0ubuntu0.14.04.144.0+build3-0ubuntu0.14.04.144.0.1+build2-0ubuntu0.14.04.144.0.2+build1-0ubuntu0.14.04.145.0+build2-0ubuntu0.14.04.145.0.1+build1-0ubuntu0.14.04.245.0.2+build1-0ubuntu0.14.04.146.0+build5-0ubuntu0.14.04.246.0.1+build1-0ubuntu0.14.04.347.0+build3-0ubuntu0.14.04.1 |
48.0+build2-0ubuntu0.14.04.1 |
firefoxUbuntu:16.04:LTS From an advisory covering 22 CVEs |
before 48.0+build2-0ubuntu0.16.04.1, plus listed versions 41.0.2+build2-0ubuntu142.0+build2-0ubuntu144.0+build3-0ubuntu244.0.1+build1-0ubuntu144.0.2+build1-0ubuntu1 Show 6 moreShow less45.0+build2-0ubuntu145.0.1+build1-0ubuntu145.0.2+build1-0ubuntu146.0+build5-0ubuntu0.16.04.246.0.1+build1-0ubuntu0.16.04.247.0+build3-0ubuntu0.16.04.1 |
48.0+build2-0ubuntu0.16.04.1 |
MozillaFirefoxopenSUSE:Tumbleweed From an advisory covering 899 CVEs |
before 50.1.0-1.1 | 50.1.0-1.1 |
firefox-esropenSUSE:Tumbleweed From an advisory covering 1860 CVEs |
before 128.5.1-1.1 | 128.5.1-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-5251 is a medium vulnerability (CVSS 4.3) in Mozilla Firefox, published August 3, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.47%, the 73rd percentile. Fixed in firefox 48.0+build2-0ubuntu0.14.04.1.
References
securitytracker.com/id/1036508
ubuntu.com/usn/USN-3044-1
mozilla.org/security/announce/2016/mfsa2016-66.html
bugzilla.mozilla.org/show_bug.cgi?id=1255570
securityfocus.com/bid/92260
security.gentoo.org/glsa/201701-15
Show 194 moreShow less
lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html
lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
nvd.nist.gov/vuln/detail/CVE-2016-5251
github.com/advisories/GHSA-p834-7563-6j4f
ubuntu.com/security/CVE-2016-5251
mozilla.org/en-US/security/advisories/mfsa2016-66
ubuntu.com/security/notices/USN-3044-1
cve.org/CVERecord?id=CVE-2016-5251
ubuntu.com/security/CVE-2016-0718
ubuntu.com/security/CVE-2016-2830
ubuntu.com/security/CVE-2016-2835
ubuntu.com/security/CVE-2016-2836
ubuntu.com/security/CVE-2016-2837
ubuntu.com/security/CVE-2016-2838
ubuntu.com/security/CVE-2016-2839
ubuntu.com/security/CVE-2016-5250
ubuntu.com/security/CVE-2016-5252
ubuntu.com/security/CVE-2016-5254
ubuntu.com/security/CVE-2016-5255
ubuntu.com/security/CVE-2016-5258
ubuntu.com/security/CVE-2016-5259
ubuntu.com/security/CVE-2016-5260
ubuntu.com/security/CVE-2016-5261
ubuntu.com/security/CVE-2016-5262
ubuntu.com/security/CVE-2016-5263
ubuntu.com/security/CVE-2016-5264
ubuntu.com/security/CVE-2016-5265
ubuntu.com/security/CVE-2016-5266
ubuntu.com/security/CVE-2016-5268
suse.com/security/cve/CVE-2008-5913
suse.com/security/cve/CVE-2009-0040
suse.com/security/cve/CVE-2009-0652
suse.com/security/cve/CVE-2009-0771
suse.com/security/cve/CVE-2009-0772
suse.com/security/cve/CVE-2009-0773
suse.com/security/cve/CVE-2009-0774
suse.com/security/cve/CVE-2009-0775
suse.com/security/cve/CVE-2009-0776
suse.com/security/cve/CVE-2009-0777
suse.com/security/cve/CVE-2009-1044
suse.com/security/cve/CVE-2009-1169
suse.com/security/cve/CVE-2009-1302
suse.com/security/cve/CVE-2009-1303
suse.com/security/cve/CVE-2009-1304
suse.com/security/cve/CVE-2009-1305
suse.com/security/cve/CVE-2009-1306
suse.com/security/cve/CVE-2009-1307
suse.com/security/cve/CVE-2009-1308
suse.com/security/cve/CVE-2009-1309
suse.com/security/cve/CVE-2009-1310
suse.com/security/cve/CVE-2009-1311
suse.com/security/cve/CVE-2009-1312
suse.com/security/cve/CVE-2009-1313
suse.com/security/cve/CVE-2009-1563
suse.com/security/cve/CVE-2009-2470
suse.com/security/cve/CVE-2009-2654
suse.com/security/cve/CVE-2009-3069
suse.com/security/cve/CVE-2009-3070
suse.com/security/cve/CVE-2009-3071
suse.com/security/cve/CVE-2009-3072
suse.com/security/cve/CVE-2009-3073
suse.com/security/cve/CVE-2009-3074
suse.com/security/cve/CVE-2009-3075
suse.com/security/cve/CVE-2009-3077
suse.com/security/cve/CVE-2009-3078
suse.com/security/cve/CVE-2009-3079
suse.com/security/cve/CVE-2009-3274
suse.com/security/cve/CVE-2009-3370
suse.com/security/cve/CVE-2009-3371
suse.com/security/cve/CVE-2009-3372
suse.com/security/cve/CVE-2009-3373
suse.com/security/cve/CVE-2009-3374
suse.com/security/cve/CVE-2009-3375
suse.com/security/cve/CVE-2009-3376
suse.com/security/cve/CVE-2009-3377
suse.com/security/cve/CVE-2009-3378
suse.com/security/cve/CVE-2009-3379
suse.com/security/cve/CVE-2009-3380
suse.com/security/cve/CVE-2009-3381
suse.com/security/cve/CVE-2009-3383
suse.com/security/cve/CVE-2009-3388
suse.com/security/cve/CVE-2009-3389
suse.com/security/cve/CVE-2009-3555
suse.com/security/cve/CVE-2009-3979
suse.com/security/cve/CVE-2009-3980
suse.com/security/cve/CVE-2009-3982
suse.com/security/cve/CVE-2009-3983
suse.com/security/cve/CVE-2009-3984
suse.com/security/cve/CVE-2009-3985
suse.com/security/cve/CVE-2010-0164
suse.com/security/cve/CVE-2010-0165
suse.com/security/cve/CVE-2010-0166
suse.com/security/cve/CVE-2010-0167
suse.com/security/cve/CVE-2010-0168
suse.com/security/cve/CVE-2010-0169
suse.com/security/cve/CVE-2010-0170
suse.com/security/cve/CVE-2010-0171
suse.com/security/cve/CVE-2010-0172
suse.com/security/cve/CVE-2010-0173
suse.com/security/cve/CVE-2010-0174
suse.com/security/cve/CVE-2010-0176
suse.com/security/cve/CVE-2010-0177
suse.com/security/cve/CVE-2010-0178
suse.com/security/cve/CVE-2010-0181
suse.com/security/cve/CVE-2010-0182
suse.com/security/cve/CVE-2010-0654
suse.com/security/cve/CVE-2010-1028
suse.com/security/cve/CVE-2010-1121
suse.com/security/cve/CVE-2010-1125
suse.com/security/cve/CVE-2010-1196
suse.com/security/cve/CVE-2010-1197
suse.com/security/cve/CVE-2010-1198
suse.com/security/cve/CVE-2010-1199
suse.com/security/cve/CVE-2010-1200
suse.com/security/cve/CVE-2010-1201
suse.com/security/cve/CVE-2010-1202
suse.com/security/cve/CVE-2010-1203
suse.com/security/cve/CVE-2010-1205
suse.com/security/cve/CVE-2010-1206
suse.com/security/cve/CVE-2010-1207
suse.com/security/cve/CVE-2010-1208
suse.com/security/cve/CVE-2010-1209
suse.com/security/cve/CVE-2010-1210
suse.com/security/cve/CVE-2010-1211
suse.com/security/cve/CVE-2010-1212
suse.com/security/cve/CVE-2010-1213
suse.com/security/cve/CVE-2010-1214
suse.com/security/cve/CVE-2010-1215
suse.com/security/cve/CVE-2010-2751
suse.com/security/cve/CVE-2010-2752
suse.com/security/cve/CVE-2010-2753
suse.com/security/cve/CVE-2010-2754
suse.com/security/cve/CVE-2010-2755
suse.com/security/cve/CVE-2010-2760
suse.com/security/cve/CVE-2010-2762
suse.com/security/cve/CVE-2010-2764
suse.com/security/cve/CVE-2010-2765
suse.com/security/cve/CVE-2010-2766
suse.com/security/cve/CVE-2010-2767
suse.com/security/cve/CVE-2010-2768
suse.com/security/cve/CVE-2010-2769
suse.com/security/cve/CVE-2010-3166
suse.com/security/cve/CVE-2010-3167
suse.com/security/cve/CVE-2010-3168
suse.com/security/cve/CVE-2010-3169
suse.com/security/cve/CVE-2010-3170
suse.com/security/cve/CVE-2010-3173
suse.com/security/cve/CVE-2010-3174
suse.com/security/cve/CVE-2010-3175
suse.com/security/cve/CVE-2010-3176
suse.com/security/cve/CVE-2010-3177
suse.com/security/cve/CVE-2010-3178
suse.com/security/cve/CVE-2010-3179
suse.com/security/cve/CVE-2010-3180
suse.com/security/cve/CVE-2010-3182
suse.com/security/cve/CVE-2010-3183
suse.com/security/cve/CVE-2010-3765
suse.com/security/cve/CVE-2011-0068
suse.com/security/cve/CVE-2011-0069
suse.com/security/cve/CVE-2011-0070
suse.com/security/cve/CVE-2011-0079
suse.com/security/cve/CVE-2011-0080
suse.com/security/cve/CVE-2011-0081
suse.com/security/cve/CVE-2011-0084
suse.com/security/cve/CVE-2011-1187
suse.com/security/cve/CVE-2011-1202
suse.com/security/cve/CVE-2011-2366
suse.com/security/cve/CVE-2011-2367
suse.com/security/cve/CVE-2011-2368
suse.com/security/cve/CVE-2011-2369
suse.com/security/cve/CVE-2011-2370
suse.com/security/cve/CVE-2011-2371
suse.com/security/cve/CVE-2011-2372
suse.com/security/cve/CVE-2011-2373
suse.com/security/cve/CVE-2011-2374
suse.com/security/cve/CVE-2011-2375
suse.com/security/cve/CVE-2011-2377
suse.com/security/cve/CVE-2011-2985
suse.com/security/cve/CVE-2011-2986
suse.com/security/cve/CVE-2011-2988
suse.com/security/cve/CVE-2011-2989
suse.com/security/cve/CVE-2011-2990
suse.com/security/cve/CVE-2011-2991
suse.com/security/cve/CVE-2011-2992
suse.com/security/cve/CVE-2011-2993
suse.com/security/cve/CVE-2011-2995
suse.com/security/cve/CVE-2011-2996
suse.com/security/cve/CVE-2011-2997
suse.com/security/cve/CVE-2011-3000
suse.com/security/cve/CVE-2011-3001
suse.com/security/cve/CVE-2011-3002
suse.com/security/cve/CVE-2011-3003
suse.com/security/cve/CVE-2011-3004
lists.opensuse.org/archives/list/[email protected]/thread/3HI2RC7AJAHY74Q6MK7GNGWU6TITB22V
Left out here: 1,890 references and the rest of 1 source description. The JSON record has them.