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CVE-2005-1477

29
FAUCET Score

CVE-2005-1477 is a critical vulnerability in Firefox 1.0.3 that allows remote websites on the browser's whitelist (e.g., update.mozilla.org) to execute arbitrary JavaScript with chrome privileges. This, when combined with other vulnerabilities like CVE-2005-1476, can lead to arbitrary code execution on the user's system. The attack vector is network-based with high attack complexity, and it carries a CVSS score of 5.1, indicating potential for partial confidentiality, integrity, and availability impact. While not currently on CISA's KEV catalog or actively exploited, public exploit code exists (EDB-986), and its FAUCET Risk Score of 97/100 highlights its significant danger despite minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:1.0.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.1MEDIUM

AV:N/AC:H/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
15.24%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-986 · May 7, 2005
This CVE's current EPSS score of 0.1524 is in the 97th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:1.0.4-1.4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: devhelp-0:0.9.2-2.4.5
View patch

Vendor Advisories (1)

redhatCVE-2005-1477Important

security flaw

May 8, 2005

References

ftp.sco.com / pub/updates/OpenServer/SCOSA-2005.49/SCOSA-2005.49.txt
greyhatsecurity.org / firefox.htm
Exploit
greyhatsecurity.org / vulntests/ffrc.htm
Exploit
marc.info
marc.info
bugzilla.mozilla.org / show_bug.cgi
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/15292
Patch
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/20443
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100001
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9231
kb.cert.org / vuls/id/648758
US Government Resource
mozilla.org / security/announce/mfsa2005-42.html
redhat.com / support/errata/RHSA-2005-434.html
redhat.com / support/errata/RHSA-2005-435.html
securityfocus.com / bid/13544
securityfocus.com / bid/15495
vupen.com / english/advisories/2005/0493