CVE-2013-6673
Telemetry drift only. No threshold crossed and no authority ruling changed.
CVE record, CISA KEV and EPSS as of 2026-10-18.
CVEs like this one computed, by meaning
What to do now held facts and links
- Upgrade to the fixed version for your release line, or later: firefox 24.2; firefox 26.0; seamonkey 2.23; thunderbird 24.2 upper bounds of the CVE record's affected ranges
- Record your decision, dated and frozen with today's evidence: patch by a date · mitigated by a compensating control · deferred · accepted the risk · not affected
- Check your version against the ranges this record publishes.
What it is stated by the CNA
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.
- weakness
- Not named by the CNA. NVD maps it to CWE-310.
- affected
- Not named by the CNA. The published ranges name Mozilla firefox; Mozilla seamonkey; Mozilla thunderbird; and 6 more.
- published ranges
- fedoraproject fedora 18; fedoraproject fedora 19; fedoraproject fedora 20; mozilla firefox < 26.0; and 13 more on the CVE page
- first unaffected version, by branch
- firefox 24.2; firefox 26.0; seamonkey 2.23; thunderbird 24.2
- assigned by
- mozilla
- published
- 2013-12-11
check us securityfocus.com lists.opensuse.org lists.opensuse.org lists.opensuse.org
Exploit code held, dated
- exploit code
- None held in the PoC-in-GitHub feed. A public repository changes this brief.
What moved held, dated
| date | EPSS | event |
|---|---|---|
| 4 Feb 2022 | 0.02686 | |
| 7 Mar 2023 | 0.00119 | scoring model v2023.03.01 |
| 17 Dec 2024 | 0.00599 | |
| 17 Mar 2025 | 0.00471 | scoring model v2025.03.14 |
| 29 Mar 2025 | 0.01579 | |
| 30 Mar 2025 | 0.00471 | |
| 9 Jul 2025 | 0.00545 | |
| 14 Jun 2026 | 0.0076 | |
| 15 Jun 2026 | 0.02886 | scoring model v2026.06.15 |
9 observations held. A step marked with a scoring model moved because the measurement was replaced, not because the vulnerability changed.
Outside the record researched, cited
This section reads the record's references and adds cited findings from outside it. It needs an account. Everything above is held facts and is complete without it.
What would change this brief held, dated
- CISA KEV
- Not listed in the catalogue we hold. A listing changes this brief.
- exploit probability
- 0.03 on 2026-06-15 (FIRST's EPSS, a probability and not evidence of exploitation). Next band line: 10% (0.10). Crossing a line changes this brief.
- fix
- Held: firefox 24.2; firefox 26.0; seamonkey 2.23; thunderbird 24.2. A newer fix from the CNA or OSV changes this brief.
How to check this
Every value above is held with two dates: when it was true upstream (as_of) and when we recorded it (tx_from). Re-derive the exploit probability as it stood on any date:
SELECT value, source, source_version, as_of, tx_from
FROM volatile_valid_as_of('CVE-2013-6673', '2026-10-31T23:59:59.999999Z', now());