CVE-2013-0776
Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3,...
4.0 MediumFix available
CVE-2013-0776 is a medium vulnerability (CVSS 4.0) in Mozilla Firefox, published February 19, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.30%, the 70th percentile. Fixed in iceweasel 17.0.6esr-1~deb7u1.
Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16 allow man-in-the-middle attackers to spoof the address bar by operating a proxy server that provides a 407 HTTP status code accompanied by web script, as demonstrated by a phishing attack on an HTTPS site.
Exploit likelihood
1.30%Down 0.2 points since Feb 4, 2022
What each source reports
NVD Score used
Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16 allow man-in-the-middle attackers to spoof the address bar by operating a proxy server that provides a 407 HTTP status code accompanied by web script, as demonstrated by a phishing attack on an HTTPS site.
- Record
CVE-2013-0776- CVSS 2.0
- 4.0 Medium
AV:N/AC:H/Au:N/C:P/I:P/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16 allow man-in-the-middle attackers to spoof the address bar by operating a proxy server that provides a 407 HTTP status code accompanied by web script, as demonstrated by a phishing attack on an HTTPS site.
- Record
CVE-2013-0776- Updated
- 2026-11-02
EUVDEUVD-2013-0787 No score
Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16 allow man-in-the-middle attackers to spoof the address bar by operating a proxy server that provides a 407 HTTP status code accompanied by web script, as demonstrated by a phishing attack on an HTTPS site.
- Record
EUVD-2013-0787- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rm2m-chmf-gp2r No score
Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3,...
Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16 allow man-in-the-middle attackers to spoof the address bar by operating a proxy server that provides a 407 HTTP status code accompanied by web script, as demonstrated by a phishing attack on an HTTPS site.
- Record
GHSA-rm2m-chmf-gp2r- Weakness
- CWE-295
- 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-2024:10218-1 No score
seamonkey-2.40-6.1 on GA media
These are all security issues fixed in the seamonkey-2.40-6.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10218-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10230-1 No score
MozillaThunderbird-45.5.1-1.1 on GA media
These are all security issues fixed in the MozillaThunderbird-45.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10230-1- 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
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
iceweaselDebian:7 |
before 17.0.6esr-1~deb7u1, plus listed versions 10.0.12esr-110.0.12esr-1+alpha10.0.12esr-1+nmu110.0.12esr-1+nmu1+alpha11.0-1 Show 31 moreShow less11.0-211.0-311.0-411.0~b1-111.0~b1-211.0~b2-111.0~b3-111.0~b4-111.0~b5-111.0~b6-112.0-112.0-212.0-312.0-412.0-512.0-612.0-713.0-113.0.1-113.0.1-214.0.1-114.0.1-215.0-115.0.1-116.0-116.0.1-116.0.2-117.0-117.0.1-117.0.1-217.0.5esr-1 |
17.0.6esr-1~deb7u1 |
devhelpRed Hat:enterprise_linux:5::server |
before 0:0.12-23.el5_9 | 0:0.12-23.el5_9 |
devhelp-debuginfoRed Hat:enterprise_linux:5::server |
before 0:0.12-23.el5_9 | 0:0.12-23.el5_9 |
devhelp-develRed Hat:enterprise_linux:5::server |
before 0:0.12-23.el5_9 | 0:0.12-23.el5_9 |
firefoxRed Hat:enterprise_linux:5::server |
before 0:17.0.3-1.el5_9 | 0:17.0.3-1.el5_9 |
firefox-debuginfoRed Hat:enterprise_linux:5::server |
before 0:17.0.3-1.el5_9 | 0:17.0.3-1.el5_9 |
xulrunnerRed Hat:enterprise_linux:5::server |
before 0:17.0.3-1.el5_9 | 0:17.0.3-1.el5_9 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::server |
before 0:17.0.3-1.el5_9 | 0:17.0.3-1.el5_9 |
xulrunner-develRed Hat:enterprise_linux:5::server |
before 0:17.0.3-1.el5_9 | 0:17.0.3-1.el5_9 |
yelpRed Hat:enterprise_linux:5::server |
before 0:2.16.0-30.el5_9 | 0:2.16.0-30.el5_9 |
Show 76 moreShow less
| Package | Affected | Fixed |
|---|---|---|
yelp-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.16.0-30.el5_9 | 0:2.16.0-30.el5_9 |
firefoxRed Hat:enterprise_linux:6::client |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::client |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
libproxyRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-binRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-debuginfoRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-pythonRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::client |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::client |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
yelpRed Hat:enterprise_linux:6::client |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
yelp-debuginfoRed Hat:enterprise_linux:6::client |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
libproxy-develRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-gnomeRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-kdeRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-mozjsRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-webkitRed Hat:enterprise_linux:6::client |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::client |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
firefoxRed Hat:enterprise_linux:6::computenode |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::computenode |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
libproxyRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-binRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-debuginfoRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-develRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-gnomeRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-kdeRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-mozjsRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-pythonRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-webkitRed Hat:enterprise_linux:6::computenode |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::computenode |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::computenode |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::computenode |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
yelpRed Hat:enterprise_linux:6::computenode |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
yelp-debuginfoRed Hat:enterprise_linux:6::computenode |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
firefoxRed Hat:enterprise_linux:6::server |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::server |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
libproxyRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-binRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-debuginfoRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-pythonRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::server |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::server |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
yelpRed Hat:enterprise_linux:6::server |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
yelp-debuginfoRed Hat:enterprise_linux:6::server |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
libproxy-develRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-gnomeRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-kdeRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-mozjsRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-webkitRed Hat:enterprise_linux:6::server |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::server |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
firefoxRed Hat:enterprise_linux:6::workstation |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
libproxyRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-binRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-pythonRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::workstation |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
yelpRed Hat:enterprise_linux:6::workstation |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
yelp-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:2.28.1-17.el6_3 | 0:2.28.1-17.el6_3 |
libproxy-develRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-gnomeRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-kdeRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-mozjsRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
libproxy-webkitRed Hat:enterprise_linux:6::workstation |
before 0:0.3.0-4.el6_3 | 0:0.3.0-4.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::workstation |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
thunderbirdRed Hat:rhel_productivity:5 |
before 0:17.0.3-1.el5_9 | 0:17.0.3-1.el5_9 |
thunderbird-debuginfoRed Hat:rhel_productivity:5 |
before 0:17.0.3-1.el5_9 | 0:17.0.3-1.el5_9 |
thunderbirdRed Hat:enterprise_linux:6::client |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::client |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
thunderbirdRed Hat:enterprise_linux:6::server |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::server |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
thunderbirdRed Hat:enterprise_linux:6::workstation |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:17.0.3-1.el6_3 | 0:17.0.3-1.el6_3 |
MozillaFirefoxopenSUSE:Tumbleweed |
before 50.1.0-1.1 | 50.1.0-1.1 |
MozillaThunderbirdopenSUSE:Tumbleweed |
before 45.5.1-1.1 | 45.5.1-1.1 |
firefox-esropenSUSE:Tumbleweed |
before 128.5.1-1.1 | 128.5.1-1.1 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
debian.org/security/2013/dsa-2699
ubuntu.com/usn/USN-1729-1
mozilla.org/security/announce/2013/mfsa2013-27.html
bugzilla.mozilla.org/show_bug.cgi?id=796475
Show 194 moreShow less
lists.opensuse.org/opensuse-updates/2013-02/msg00062.html
rhn.redhat.com/errata/RHSA-2013-0271.html
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16666
nvd.nist.gov/vuln/detail/CVE-2013-0776
github.com/advisories/GHSA-rm2m-chmf-gp2r
access.redhat.com/errata/RHSA-2013:0271
bugzilla.redhat.com/show_bug.cgi?id=911836
security.access.redhat.com/data/csaf/v2/advisories/2013/rhsa-2013_0271.json
cve.org/CVERecord?id=CVE-2013-0775
suse.com/security/cve/CVE-2008-5913
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Left out here: 1,940 references. The JSON record has them.