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Fencer Vulns
high 7.5

CVE-2005-1157 json

Firefox before 1.0.3, Mozilla Suite before 1.7.7, and Netscape 7.2 allows remote attackers to replace existing search plugins with maliciou…

published 2005-04-18 21 y ago modified 2026-06-16 4 mo ago also EUVD-2005-1160

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

Firefox before 1.0.3, Mozilla Suite before 1.7.7, and Netscape 7.2 allows remote attackers to replace existing search plugins with malicious ones using sidebar.addSearchEngine and the same filename as the target engine, which may not be displayed in the GUI, which could then be used to execute malicious script, aka "Firesearching 2."

Patch / fix

  • devhelp RHEL 4 0.9.2-2.4.4
  • firefox RHEL 4 1.0.3-1.4.1

red hat advisories RHSA-2005:386RHSA-2005:383

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-2005-1157 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 devhelp 0.9.2-2.4.4, firefox 1.0.3-1.4.1 Red Hat Enterprise Linux Desktop version 4 devhelp 0.9.2-2.4.4, firefox 1.0.3-1.4.1 Red Hat Enterprise Linux ES version 4 devhelp 0.9.2-2.4.4, firefox 1.0.3-1.4.1 Red Hat Enterprise Linux WS version 4 devhelp 0.9.2-2.4.4, firefox 1.0.3-1.4.1
    fixed: vendor fix RHSA-2005:386

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

Exploit prediction

2.46% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • securityfocus.com http://www.securityfocus.com/bid/13211 referenced PoC, tagged "exploit" by a source, unverified
  • mikx.de http://www.mikx.de/firesearching/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/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.