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CVE-2005-0147

21
FAUCET Score

CVE-2005-0147 describes a vulnerability in Firefox before 1.0 and Mozilla before 1.7.5, where the browsers would respond to 407 proxy authentication requests from any server when configured to use a proxy. This flaw allowed remote attackers to steal NTLM or SPNEGO credentials. With a CVSS score of 7.5, it is considered highly severe due to its network-based attack vector, low attack complexity, and potential for partial compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.8CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.8:*:*:*:*:*:*:*
0.9CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9:*:*:*:*:*:*:*
0.9.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9.1:*:*:*:*:*:*:*
0.9.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9.2:*:*:*:*:*:*:*
0.9.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.41%
Probability of exploitation in next 30 days
EPSS Percentile
69.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0140 is in the 51st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2005-0147Important

security flaw

Jan 20, 2005

References

bugzilla.mozilla.org / show_bug.cgi
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/19174
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100049
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9578
mozilla.org / security/announce/mfsa2005-09.html
Vendor Advisory
redhat.com / support/errata/RHSA-2005-323.html
PatchVendor Advisory
securityfocus.com / bid/12407