The install function in Firefox 1.0.3 allows remote web sites on the browser's whitelist, such as update.mozilla.org or addon.mozilla.org, to execute arbitrary Javascript with chrome privileges, leading to arbitrary code execution on the system when combined with vulnerabilities such as CVE-2005-1476, as demonstrated using a javascript: URL as the package icon and a cross-site scripting (XSS) attack on a vulnerable whitelist site.
Conclusion & alert: CVE-2005-1477 is rated High Exploit Risk (74.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 41.65%, 97th percentile). Core evidence: 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +9.84% 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 |
|---|---|---|---|---|
| 986 | exploit_db | edb | 2005-05-07 | 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 | 2025-08-08 | 31.80% | 41.65% | +9.84% |
| 2 | 2025-03-30 | 25.55% | 31.80% | +6.25% |
| 3 | 2025-03-29 | — | 25.55% | — |
Full EPSS history (8 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 |
|---|---|---|---|
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2005-1477 |
ubuntu
|
medium | CVE-2005-1477 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-2005-1477 |