CVE-2015-0816
MediumPublic exploitMozilla: resource: // documents can load privileged pages (MFSA 2015-33)
Published Mar 31, 2015 · Updated Apr 22, 2026 · Also known as UBUNTU-CVE-2015-0816
Key Facts
Patch immediately- CVE-2015-0816 is a medium-severity vulnerability (CVSS 5.0 v2) affecting Firefox (Mozilla), Thunderbird (Mozilla), icedove (debian) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 67% probability of exploitation in the next 30 days.
- Fixed versions are available, including Firefox 0:31.6.0-2.ael7b_1, Firefox 0:31.6.0-2.el5_11, Firefox 0:31.6.0-2.el6_6.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
5.0
AV:N/AC:L/Au:N/C:N/I:P/A:N
EPSS (30-day exploit likelihood)
67%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2015-0816 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as demonstrated by the resource: URL associated with PDF.js.
Affected Products
118 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FirefoxMozilla | See advisory | 31.5.3 |
| ThunderbirdMozilla | See advisory | 31.5 |
| icedovedebian | See advisory | 31.6.0-1~deb7u1 |
| iceweaseldebian | See advisory | 31.6.0esr-1~deb7u1 |
| xulrunner-develoracle | See advisory | 31.6.0-2.0.1.el7_1 |
Patched Releases
Firefox
0:31.6.0-2.ael7b_1, 0:31.6.0-2.el5_11, 0:31.6.0-2.el6_6, 0:31.6.0-2.el7_1, 31.6.0-2.0.1.el5_11, 31.6.0-2.0.1.el6_6, 31.6.0-2.0.1.el7_1, 37.0+build2-0ubuntu0.14.04.1, 31.5.3
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
icedove
31.6.0-1~deb7u1
iceweasel
31.6.0esr-1~deb7u1
libfreebl3
3.19.2-107.1
libfreebl3-32bit
3.19.2-107.1
libfreebl3-debuginfo
3.19.2-107.1
libfreebl3-debuginfo-32bit
3.19.2-107.1
libfreebl3-debuginfo-x86
3.19.2-107.1
libfreebl3-x86
3.19.2-107.1
libsoftokn3
3.19.2-107.1
libsoftokn3-32bit
3.19.2-107.1
libsoftokn3-debuginfo
3.19.2-107.1
libsoftokn3-debuginfo-32bit
3.19.2-107.1
libsoftokn3-debuginfo-x86
3.19.2-107.1
libsoftokn3-x86
3.19.2-107.1
Thunderbird
31.5, 0:31.6.0-1.ael7b_1, 0:31.6.0-1.el5_11, 0:31.6.0-1.el6_6, 0:31.6.0-1.el7_1, 1:31.6.0+build1-0ubuntu0.14.04.1, 31.6.0-1.0.1.el5_11, 31.6.0-1.0.1.el6_6, 31.6.0-1.0.1.el7_1
mozilla-nspr
4.10.8-52.1
mozilla-nspr-32bit
4.10.8-52.1
mozilla-nspr-debuginfo
4.10.8-52.1
mozilla-nspr-debuginfo-32bit
4.10.8-52.1
mozilla-nspr-debuginfo-x86
4.10.8-52.1
Timeline
Publicly disclosed
Mar 31, 2015
Last updated
Apr 22, 2026
Weakness Type
- CWE-250 Execution with Unnecessary Privileges
- CWE-264
References
- advisoryRHSA-2015:0766
- advisoryRHSA-2015:0771
- advisoryhttps://bugzilla.suse.com/925368
- advisoryhttps://ubuntu.com/security/CVE-2015-0801
- advisoryhttps://ubuntu.com/security/CVE-2015-0802
FAQ
Common Questions.
Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as demonstrated by the resou…
Affected: Firefox (Mozilla); Thunderbird (Mozilla); icedove (debian), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Firefox 0:31.6.0-2.ael7b_1, Firefox 0:31.6.0-2.el5_11, Firefox 0:31.6.0-2.el6_6.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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