CVE-2013-6673

Exp

Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2, Thunderbird before 24.2, and SeaMonkey before 2.23 do not recognize a user's removal of trust from an EV X.509 certificate, which makes it easier for man-in-the-middle attackers to spoof SSL servers in opportunistic circumstances via a valid certificate that is unacceptable to the user.

Published: 2013-12-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-6673 is rated High Exploit Risk (70.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.89%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.13% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-6673

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-6673

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.76% 2.89% +2.13%
2 2026-06-14 0.47% 0.76% +0.29%
3 2025-03-30 — 0.47% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-6673

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2013-6673

OS Trackers for CVE-2013-6673

vendor priority summary link
gentoo normal CVE-2013-6673: 1 GLSA(s) (201504-01), 7 atom(s) (dev-libs/nspr, mail-client/thunderbird, …); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-6673
redhat medium — https://access.redhat.com/security/cve/CVE-2013-6673
suse medium CVE-2013-6673 severity moderate: SUSE including 84 source package names (MozillaFirefox-140.2.0-160000.1.2, MozillaFirefox-24.2.0esr-0.7.1, …), 140 product×package rows across 35 product lines (SUSE Linux Enterprise Desktop 11 SP3, SUSE Linux Enterprise Desktop 12, … (35 product lines)): Fixed 126, Known Not Affected 14. https://www.suse.com/security/cve/CVE-2013-6673/
ubuntu low CVE-2013-6673 low priority: Ubuntu including 2 source packages (firefox, thunderbird), 12 status rows across 6 suites (lucid, precise, quantal, raring, saucy, upstream): released 10, ignored 2. https://ubuntu.com/security/CVE-2013-6673

Affected software / configurations for CVE-2013-6673

Vendor Product Version Raw CPE
fedoraproject fedora 18 cpe:2.3:o:fedoraproject:fedora:18:*:*:*:*:*:*:*
fedoraproject fedora 19 cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:*
fedoraproject fedora 20 cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*
mozilla firefox < 26.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla firefox >= 24.0, < 24.2 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla seamonkey < 2.23 cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
mozilla thunderbird < 24.2 cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
suse suse_linux_enterprise_software_development_kit 11.0 cpe:2.3:a:suse:suse_linux_enterprise_software_development_kit:11.0:sp3:*:*:*:*:*:*
opensuse opensuse 12.2 cpe:2.3:o:opensuse:opensuse:12.2:*:*:*:*:*:*:*
opensuse opensuse 12.3 cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:*
opensuse opensuse 13.1 cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
suse linux_enterprise_desktop 11 cpe:2.3:o:suse:linux_enterprise_desktop:11:sp3:*:*:*:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:-:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:vmware:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 12.10 cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
canonical ubuntu_linux 13.04 cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*
canonical ubuntu_linux 13.10 cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*

References for CVE-2013-6673

URL Tags
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/123437.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124108.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124257.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2014-January/125470.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-12/msg00010.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-12/msg00085.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-12/msg00086.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-12/msg00087.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-12/msg00119.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-12/msg00120.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-12/msg00121.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2014-01/msg00002.html Mailing List Third Party Advisory
http://www.mozilla.org/security/announce/2013/mfsa2013-113.html Vendor Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securityfocus.com/bid/64213 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1029470 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1029476 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2052-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2053-1 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=917380 Exploit Issue Tracking Vendor Advisory
https://security.gentoo.org/glsa/201504-01 Third Party Advisory
cvelogic Threat Intelligence