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Fencer Vulns
medium 5.1

CVE-2005-1477 json

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,…

published 2005-05-09 21 y ago modified 2026-06-16 4 mo ago also EUVD-2005-1480

cvss
5.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.2%
EPSS 15.2% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • devhelp RHEL 4 0.9.2-2.4.5
  • firefox RHEL 4 1.0.4-1.4.1

red hat advisories RHSA-2005:435RHSA-2005:434

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2005-1477 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 devhelp 0.9.2-2.4.5, firefox 1.0.4-1.4.1 Red Hat Enterprise Linux Desktop version 4 devhelp 0.9.2-2.4.5, firefox 1.0.4-1.4.1 Red Hat Enterprise Linux ES version 4 devhelp 0.9.2-2.4.5, firefox 1.0.4-1.4.1 Red Hat Enterprise Linux WS version 4 devhelp 0.9.2-2.4.5, firefox 1.0.4-1.4.1
    fixed: vendor fix RHSA-2005:435

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-986)
  2. Published

Exploit prediction

15.24% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-986 Mozilla Firefox 1.0.3 - Install Method Arbitrary Code Execution remote, 2005-05-07
  • greyhatsecurity.org http://greyhatsecurity.org/vulntests/ffrc.htm referenced PoC, tagged "exploit" by a source, unverified
  • greyhatsecurity.org http://greyhatsecurity.org/firefox.htm referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.