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Fencer Vulns
medium 4.3

CVE-2007-5340 json

Multiple vulnerabilities in the Javascript engine in Mozilla Firefox before 2.0.0.8, Thunderbird before 2.0.0.8, and SeaMonkey before 1.1.5…

published 2007-10-21 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-5319

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Multiple vulnerabilities in the Javascript engine in Mozilla Firefox before 2.0.0.8, Thunderbird before 2.0.0.8, and SeaMonkey before 1.1.5 allow remote attackers to cause a denial of service (crash) via crafted HTML that triggers memory corruption.

Patch / fix

  • thunderbird RHEL 4 1.5.0.12-0.5.el4
  • thunderbird RHEL 5 1.5.0.12-5.el5
  • seamonkey RHEL 2.1 1.0.9-0.6.el2
  • seamonkey RHEL 3 1.0.9-0.5.el3
  • seamonkey RHEL 4 1.0.9-6.el4
  • seamonkey-nss RHEL 2.1 1.0.9-0.6.el2
  • seamonkey-nss RHEL 3 1.0.9-0.5.el3
  • seamonkey-chat RHEL 2.1 1.0.9-0.6.el2

red hat advisories RHSA-2007:0981RHSA-2007:0980RHSA-2007:0979

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-2007-5340 updated

security flaw

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.5.el3, seamonkey-nss 1.0.9-0.5.el3, seamonkey-chat 1.0.9-0.5.el3, seamonkey-mail 1.0.9-0.5.el3, seamonkey-nspr 1.0.9-0.5.el3, seamonkey-js-debugger 1.0.9-0.5.el3, +1 more
    fixed: vendor fix RHSA-2007:0980
  • Red Hat Enterprise Linux (v. 5 server) firefox 1.5.0.12-6.el5
    fixed: vendor fix RHSA-2007:0979
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 seamonkey 1.0.9-0.6.el2, seamonkey-nss 1.0.9-0.6.el2, seamonkey-chat 1.0.9-0.6.el2, seamonkey-mail 1.0.9-0.6.el2, seamonkey-nspr 1.0.9-0.6.el2, seamonkey-js-debugger 1.0.9-0.6.el2, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.5.el3, seamonkey-nss 1.0.9-0.5.el3, seamonkey-chat 1.0.9-0.5.el3, seamonkey-mail 1.0.9-0.5.el3, seamonkey-nspr 1.0.9-0.5.el3, seamonkey-js-debugger 1.0.9-0.5.el3, +1 more Red Hat Enterprise Linux AS version 4 seamonkey 1.0.9-6.el4, firefox 1.5.0.12-0.7.el4, seamonkey-chat 1.0.9-6.el4, seamonkey-mail 1.0.9-6.el4, thunderbird 1.5.0.12-0.5.el4, seamonkey-js-debugger 1.0.9-6.el4, +1 more
    fixed: vendor fix RHSA-2007:0980
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 1.5.0.12-6.el5, thunderbird 1.5.0.12-5.el5
    fixed: vendor fix RHSA-2007:0979
  • Red Hat Enterprise Linux Desktop version 4 seamonkey 1.0.9-6.el4, firefox 1.5.0.12-0.7.el4, seamonkey-chat 1.0.9-6.el4, seamonkey-mail 1.0.9-6.el4, thunderbird 1.5.0.12-0.5.el4, seamonkey-js-debugger 1.0.9-6.el4, +1 more Red Hat Enterprise Linux ES version 2.1 seamonkey 1.0.9-0.6.el2, seamonkey-nss 1.0.9-0.6.el2, seamonkey-chat 1.0.9-0.6.el2, seamonkey-mail 1.0.9-0.6.el2, seamonkey-nspr 1.0.9-0.6.el2, seamonkey-js-debugger 1.0.9-0.6.el2, +1 more Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.5.el3, seamonkey-nss 1.0.9-0.5.el3, seamonkey-chat 1.0.9-0.5.el3, seamonkey-mail 1.0.9-0.5.el3, seamonkey-nspr 1.0.9-0.5.el3, seamonkey-js-debugger 1.0.9-0.5.el3, +1 more Red Hat Enterprise Linux ES version 4 seamonkey 1.0.9-6.el4, firefox 1.5.0.12-0.7.el4, seamonkey-chat 1.0.9-6.el4, seamonkey-mail 1.0.9-6.el4, thunderbird 1.5.0.12-0.5.el4, seamonkey-js-debugger 1.0.9-6.el4, +1 more Red Hat Enterprise Linux WS version 2.1 seamonkey 1.0.9-0.6.el2, seamonkey-nss 1.0.9-0.6.el2, seamonkey-chat 1.0.9-0.6.el2, seamonkey-mail 1.0.9-0.6.el2, seamonkey-nspr 1.0.9-0.6.el2, seamonkey-js-debugger 1.0.9-0.6.el2, +1 more Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.5.el3, seamonkey-nss 1.0.9-0.5.el3, seamonkey-chat 1.0.9-0.5.el3, seamonkey-mail 1.0.9-0.5.el3, seamonkey-nspr 1.0.9-0.5.el3, seamonkey-js-debugger 1.0.9-0.5.el3, +1 more
    +2 more products
    Red Hat Enterprise Linux WS version 4 seamonkey 1.0.9-6.el4, firefox 1.5.0.12-0.7.el4, seamonkey-chat 1.0.9-6.el4, seamonkey-mail 1.0.9-6.el4, thunderbird 1.5.0.12-0.5.el4, seamonkey-js-debugger 1.0.9-6.el4, +1 more Red Hat Linux Advanced Workstation 2.1 seamonkey 1.0.9-0.6.el2, seamonkey-nss 1.0.9-0.6.el2, seamonkey-chat 1.0.9-0.6.el2, seamonkey-mail 1.0.9-0.6.el2, seamonkey-nspr 1.0.9-0.6.el2, seamonkey-js-debugger 1.0.9-0.6.el2, +1 more
    fixed: vendor fix RHSA-2007:0980

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

3.43% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

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.