Mozilla Firefox before 19.0, Thunderbird before 17.0.3, and SeaMonkey before 2.16 do not prevent multiple wrapping of WebIDL objects, which allows remote attackers to bypass intended access restrictions via unspecified vectors.
Conclusion & alert: CVE-2013-0765 is rated High Risk (68.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 2.74%). Core evidence: EPSS rose +1.97% 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 | 0.78% | 2.74% | +1.97% |
| 2 | 2026-02-05 | 1.42% | 0.78% | -0.65% |
| 3 | 2025-03-30 | — | 1.42% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
high | CVE-2013-0765: 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-2013-0765 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2013-0765 |
suse
|
critical | CVE-2013-0765 severity critical: SUSE including 77 source package names (MozillaFirefox-140.2.0-160000.1.2, MozillaFirefox-17.0.3esr-0.4.2.1, …), 117 product×package rows across 29 product lines (SUSE Linux Enterprise Desktop 11 SP2, SUSE Linux Enterprise Desktop 12, … (29 product lines)): Fixed 117. | https://www.suse.com/security/cve/CVE-2013-0765/ |
ubuntu
|
medium | CVE-2013-0765 medium priority: Ubuntu including 5 source packages (firefox, seamonkey, thunderbird, xulrunner-1.9.2, xulrunner-2.0), 40 status rows across 8 suites (hardy, lucid, oneiric, precise, quantal, raring, saucy, upstream): DNE 16, released 11, ignored 7, not-affected 4, needs-triage 2. | https://ubuntu.com/security/CVE-2013-0765 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mozilla | firefox | < 19.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | seamonkey | < 2.16 | cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:* |
| opensuse | opensuse | 11.4 | cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:* |
| opensuse | opensuse | 12.1 | cpe:2.3:o:opensuse:opensuse:12.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 12.2 | cpe:2.3:o:opensuse:opensuse:12.2:*:*:*:*:*:*:* |
| 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:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 12.10 | cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2013-02/msg00017.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-updates/2013-02/msg00062.html | Mailing List Third Party Advisory |
| http://www.mozilla.org/security/announce/2013/mfsa2013-23.html | Third Party Advisory Vendor Advisory |
| http://www.ubuntu.com/usn/USN-1729-1 | Third Party Advisory |
| http://www.ubuntu.com/usn/USN-1729-2 | Third Party Advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=830614 | Issue Tracking Patch Vendor Advisory |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17097 | Third Party Advisory |