The CERT_DecodeCertPackage function in Mozilla Network Security Services (NSS), as used in Mozilla Firefox before 20.0, Firefox ESR 17.x before 17.0.5, Thunderbird before 17.0.5, Thunderbird ESR 17.x before 17.0.5, SeaMonkey before 2.17, and other products, allows remote attackers to cause a denial of service (out-of-bounds read and memory corruption) via a crafted certificate.
Conclusion & alert: CVE-2013-0791 is rated Moderate Risk (52/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.21%, 91th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. 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 | 2026-06-18 | 5.26% | 5.21% | -0.04% |
| 2 | 2026-06-15 | 2.68% | 5.26% | +2.58% |
| 3 | 2026-05-17 | — | 2.68% | — |
Full EPSS history (16 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2013-0791 unimportant priority: Debian including 1 source packages (nss), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2013-0791 |
gentoo
|
high | CVE-2013-0791: 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-2013-0791 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2013-0791 |
suse
|
medium | CVE-2013-0791 severity moderate: SUSE including 167 source package names (MozillaFirefox-17.0.6esr-0.4.1, MozillaFirefox-branding-SLED-7-0.6.9.17, …), 300 product×package rows across 34 product lines (SUSE Linux Enterprise Desktop 11 SP2, SUSE Linux Enterprise Desktop 12, … (34 product lines)): Fixed 300. | https://www.suse.com/security/cve/CVE-2013-0791/ |
ubuntu
|
low | CVE-2013-0791 low priority: Ubuntu including 6 source packages (firefox, nss, seamonkey, thunderbird, xulrunner-1.9.2, xulrunner-2.0), 48 status rows across 8 suites (hardy, lucid, oneiric, precise, quantal, raring, saucy, upstream): released 21, DNE 16, ignored 8, needs-triage 2, pending 1. | https://ubuntu.com/security/CVE-2013-0791 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mozilla | firefox | <= 20.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | firefox | >= 17.0, < 17.0.5 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | network_security_services | < 3.15 | cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* |
| mozilla | seamonkey | < 2.17 | cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:* |
| mozilla | thunderbird | < 17.0.5 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| mozilla | thunderbird_esr | >= 17.0, < 17.0.5 | cpe:2.3:a:mozilla:thunderbird_esr:*:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 10.04 | cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:* |
| canonical | ubuntu_linux | 11.10 | cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* |
| canonical | ubuntu_linux | 12.10 | cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:* |
| oracle | vm_server | 3.2 | cpe:2.3:a:oracle:vm_server:3.2:*:*:*:*:*:x86:* |
| redhat | enterprise_linux_desktop | 5.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 6.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 5.9 | cpe:2.3:o:redhat:enterprise_linux_eus:5.9:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 5.0 | cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 5.9 | cpe:2.3:o:redhat:enterprise_linux_server_aus:5.9:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 5.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 6.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* |