Mozilla Firefox 1.5.0.2, when designMode is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via certain Javascript that is not properly handled by the contentWindow.focus method in an iframe, which causes a reference to a deleted controller context object. NOTE: this was originally claimed to be a buffer overflow in (1) js320.dll and (2) xpcom_core.dll, but the vendor disputes this claim.
Conclusion & alert: CVE-2006-1993 is rated High Exploit Risk (74.7/100): CVSS Medium severity, with high exploitation likelihood (EPSS 57.32%, 98th percentile). Core evidence: 4 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +12.83% over the last day, indicating growing attacker interest. Mandatory action: 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.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 1716 | exploit_db | edb | 2006-04-24 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 2025-03-30 | 44.49% | 57.32% | +12.83% |
| 2 | 2025-03-29 | 57.32% | 44.49% | -12.83% |
| 3 | 2025-03-28 | — | 57.32% | — |
Full EPSS history (10 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.1 | 2.0 | MEDIUM |
|
4.9 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
high | CVE-2006-1993 high priority: Debian including 1 source packages (firefox), 1 status rows across 1 suites (sid): resolved 1. | https://security-tracker.debian.org/tracker/CVE-2006-1993 |
gentoo
|
normal | CVE-2006-1993: 1 GLSA(s) (200605-06), 2 atom(s) (www-client/mozilla-firefox, www-client/mozilla-firefox-bin); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2006-1993 |
ubuntu
|
medium | CVE-2006-1993 medium priority: Ubuntu including 4 source packages (firefox, firefox-granparadiso, lightning-sunbird, midbrowser), 16 status rows across 4 suites (dapper, edgy, feisty, upstream): DNE 9, needs-triage 4, released 3. | https://ubuntu.com/security/CVE-2006-1993 |