Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
Conclusion & alert: CVE-2013-0801 is rated High Risk (75.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 5.39%, 92th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.84% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 1.56% | 5.39% | +3.84% |
| 2 | 2025-03-30 | 5.58% | 1.56% | -4.03% |
| 3 | 2025-03-29 | — | 5.58% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
high | CVE-2013-0801: 1 GLSA(s) (201309-23), 6 atom(s) (mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin, www-client/seamonkey, www-client/seamonkey-bin); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-0801 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2013-0801 |
suse
|
critical | CVE-2013-0801 severity critical: SUSE including 57 source package names (MozillaFirefox-140.2.0-160000.1.2, MozillaFirefox-31.1.0esr-1.20, …), 73 product×package rows across 28 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (28 product lines)): Fixed 73. | https://www.suse.com/security/cve/CVE-2013-0801/ |
ubuntu
|
medium | CVE-2013-0801 medium priority: Ubuntu including 4 source packages (firefox, seamonkey, thunderbird, xulrunner-1.9.2), 20 status rows across 5 suites (lucid, precise, quantal, raring, upstream): released 8, DNE 6, ignored 4, needs-triage 2. | https://ubuntu.com/security/CVE-2013-0801 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mozilla | firefox | <= 20.0.1 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | firefox | 19.0 | cpe:2.3:a:mozilla:firefox:19.0:*:*:*:*:*:*:* |
| mozilla | firefox | 19.0.1 | cpe:2.3:a:mozilla:firefox:19.0.1:*:*:*:*:*:*:* |
| mozilla | firefox | 19.0.2 | cpe:2.3:a:mozilla:firefox:19.0.2:*:*:*:*:*:*:* |
| mozilla | firefox | 20.0 | cpe:2.3:a:mozilla:firefox:20.0:*:*:*:*:*:*:* |
| mozilla | firefox | 17.0 | cpe:2.3:a:mozilla:firefox:17.0:*:*:*:*:*:*:* |
| mozilla | firefox | 17.0.1 | cpe:2.3:a:mozilla:firefox:17.0.1:*:*:*:*:*:*:* |
| mozilla | firefox | 17.0.2 | cpe:2.3:a:mozilla:firefox:17.0.2:*:*:*:*:*:*:* |
| mozilla | firefox | 17.0.3 | cpe:2.3:a:mozilla:firefox:17.0.3:*:*:*:*:*:*:* |
| mozilla | firefox | 17.0.4 | cpe:2.3:a:mozilla:firefox:17.0.4:*:*:*:*:*:*:* |
| mozilla | firefox | 17.0.5 | cpe:2.3:a:mozilla:firefox:17.0.5:*:*:*:*:*:*:* |
| mozilla | thunderbird | <= 17.0.5 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| mozilla | thunderbird | 17.0 | cpe:2.3:a:mozilla:thunderbird:17.0:*:*:*:*:*:*:* |
| mozilla | thunderbird | 17.0.1 | cpe:2.3:a:mozilla:thunderbird:17.0.1:*:*:*:*:*:*:* |
| mozilla | thunderbird | 17.0.2 | cpe:2.3:a:mozilla:thunderbird:17.0.2:*:*:*:*:*:*:* |
| mozilla | thunderbird | 17.0.3 | cpe:2.3:a:mozilla:thunderbird:17.0.3:*:*:*:*:*:*:* |
| mozilla | thunderbird | 17.0.4 | cpe:2.3:a:mozilla:thunderbird:17.0.4:*:*:*:*:*:*:* |
| mozilla | thunderbird_esr | 17.0 | cpe:2.3:a:mozilla:thunderbird_esr:17.0:*:*:*:*:*:*:* |
| mozilla | thunderbird_esr | 17.0.1 | cpe:2.3:a:mozilla:thunderbird_esr:17.0.1:*:*:*:*:*:*:* |
| mozilla | thunderbird_esr | 17.0.2 | cpe:2.3:a:mozilla:thunderbird_esr:17.0.2:*:*:*:*:*:*:* |
| mozilla | thunderbird_esr | 17.0.3 | cpe:2.3:a:mozilla:thunderbird_esr:17.0.3:*:*:*:*:*:*:* |
| mozilla | thunderbird_esr | 17.0.4 | cpe:2.3:a:mozilla:thunderbird_esr:17.0.4:*:*:*:*:*:*:* |
| mozilla | thunderbird_esr | 17.0.5 | cpe:2.3:a:mozilla:thunderbird_esr:17.0.5:*:*:*:*:*:*:* |