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CVE-2005-1156

20
FAUCET Score

CVE-2005-1156 describes a critical vulnerability affecting Firefox before 1.0.3, Mozilla Suite before 1.7.7, and Netscape 7.2, allowing remote attackers to execute arbitrary script and code. This is achieved by tricking users into adding a malicious search plugin via the sidebar.addSearchEngine function. With a CVSS score of 7.5, this vulnerability has a high severity, indicating that an unauthenticated attacker can exploit it over the network with low complexity, leading to potential compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, 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:*:*:*:*:*:*:*
0.9CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9:rc:*:*:*:*:*:*
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:*:*:*:*:*:*:*

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
2.34%
Probability of exploitation in next 30 days
EPSS Percentile
81.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0234 is in the 68th percentile among its peer group of 51,551 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, 0.1 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

Patch Available

Vendor Patches (3)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:1.0.3-1.4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: devhelp-0:0.9.2-2.4.4
View patch

Vendor Advisories (1)

redhatCVE-2005-1156Moderate

security flaw

Apr 15, 2005

References

ftp.sco.com / pub/updates/OpenServer/SCOSA-2005.49/SCOSA-2005.49.txt
bugzilla.mozilla.org / show_bug.cgi
Patch
secunia.com / advisories/14938
PatchVendor Advisory
secunia.com / advisories/14992
PatchVendor Advisory
secunia.com / advisories/14996
PatchVendor Advisory
securitytracker.com / id
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/20125
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100020
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11230
gentoo.org / security/en/glsa/glsa-200504-18.xml
PatchVendor Advisory
mikx.de / firesearching
Exploit
mozilla.org / security/announce/mfsa2005-38.html
Vendor Advisory
redhat.com / support/errata/RHSA-2005-383.html
PatchVendor Advisory
redhat.com / support/errata/RHSA-2005-384.html
redhat.com / support/errata/RHSA-2005-386.html
PatchVendor Advisory
securityfocus.com / bid/13211
ExploitPatch
securityfocus.com / bid/15495