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Fencer Vulns
high 7.5

CVE-2007-0981 in the critical feed json

Mozilla based browsers, including Firefox before 1.5.0.10 and 2.x before 2.0.0.2, and SeaMonkey before 1.0.8, allow remote attackers to byp…

published 2007-02-16 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-0975

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
12.5%
EPSS 12.5% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

Mozilla based browsers, including Firefox before 1.5.0.10 and 2.x before 2.0.0.2, and SeaMonkey before 1.0.8, allow remote attackers to bypass the same origin policy, steal cookies, and conduct other attacks by writing a URI with a null byte to the hostname (location.hostname) DOM property, due to interactions with DNS resolver code.

Patch / fix

  • thunderbird RHEL 5 1.5.0.10-1.el5
  • firefox RHEL 5 1.5.0.10-2.el5
  • yelp RHEL 5 2.16.0-14.0.1.el5
  • devhelp RHEL 5 0.12-10.0.1.el5
  • firefox RHEL 4 1.5.0.10-0.1.el4
  • thunderbird RHEL 4 1.5.0.10-0.1.el4
  • seamonkey RHEL 2.1 1.0.8-0.2.el2
  • seamonkey RHEL 3 1.0.8-0.2.el3

red hat advisories RHSA-2007:0108RHSA-2007:0097RHSA-2007:0079RHSA-2007:0078RHSA-2007:0077

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 92.0-1.2

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1

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-2007-0981 updated

: seamonkey cookie setting / same-domain bypass vulnerability

  • Red Hat Desktop version 3 seamonkey 1.0.8-0.2.el3, seamonkey-nss 1.0.8-0.2.el3, seamonkey-chat 1.0.8-0.2.el3, seamonkey-mail 1.0.8-0.2.el3, seamonkey-nspr 1.0.8-0.2.el3, seamonkey-js-debugger 1.0.8-0.2.el3, +1 more
    fixed: vendor fix RHSA-2007:0077
  • Red Hat Enterprise Linux (v. 5 server) firefox 1.5.0.10-2.el5, yelp 2.16.0-14.0.1.el5, devhelp 0.12-10.0.1.el5
    fixed: vendor fix RHSA-2007:0097
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 seamonkey 1.0.8-0.2.el2, seamonkey-nss 1.0.8-0.2.el2, seamonkey-chat 1.0.8-0.2.el2, seamonkey-mail 1.0.8-0.2.el2, seamonkey-nspr 1.0.8-0.2.el2, seamonkey-js-debugger 1.0.8-0.2.el2, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.8-0.2.el3, seamonkey-nss 1.0.8-0.2.el3, seamonkey-chat 1.0.8-0.2.el3, seamonkey-mail 1.0.8-0.2.el3, seamonkey-nspr 1.0.8-0.2.el3, seamonkey-js-debugger 1.0.8-0.2.el3, +1 more Red Hat Enterprise Linux AS version 4 devhelp 0.10-0.7.el4, seamonkey 1.0.8-0.2.el4, firefox 1.5.0.10-0.1.el4, seamonkey-chat 1.0.8-0.2.el4, seamonkey-mail 1.0.8-0.2.el4, thunderbird 1.5.0.10-0.1.el4, +2 more
    fixed: vendor fix RHSA-2007:0077
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 1.5.0.10-2.el5, yelp 2.16.0-14.0.1.el5, devhelp 0.12-10.0.1.el5, thunderbird 1.5.0.10-1.el5
    fixed: vendor fix RHSA-2007:0097
  • Red Hat Enterprise Linux Desktop version 4 devhelp 0.10-0.7.el4, seamonkey 1.0.8-0.2.el4, firefox 1.5.0.10-0.1.el4, seamonkey-chat 1.0.8-0.2.el4, seamonkey-mail 1.0.8-0.2.el4, thunderbird 1.5.0.10-0.1.el4, +2 more
    fixed: vendor fix RHSA-2007:0077
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) devhelp 0.12-10.0.1.el5
    fixed: vendor fix RHSA-2007:0097
  • Red Hat Enterprise Linux ES version 2.1 seamonkey 1.0.8-0.2.el2, seamonkey-nss 1.0.8-0.2.el2, seamonkey-chat 1.0.8-0.2.el2, seamonkey-mail 1.0.8-0.2.el2, seamonkey-nspr 1.0.8-0.2.el2, seamonkey-js-debugger 1.0.8-0.2.el2, +1 more Red Hat Enterprise Linux ES version 3 seamonkey 1.0.8-0.2.el3, seamonkey-nss 1.0.8-0.2.el3, seamonkey-chat 1.0.8-0.2.el3, seamonkey-mail 1.0.8-0.2.el3, seamonkey-nspr 1.0.8-0.2.el3, seamonkey-js-debugger 1.0.8-0.2.el3, +1 more Red Hat Enterprise Linux ES version 4 devhelp 0.10-0.7.el4, seamonkey 1.0.8-0.2.el4, firefox 1.5.0.10-0.1.el4, seamonkey-chat 1.0.8-0.2.el4, seamonkey-mail 1.0.8-0.2.el4, thunderbird 1.5.0.10-0.1.el4, +2 more Red Hat Enterprise Linux WS version 2.1 seamonkey 1.0.8-0.2.el2, seamonkey-nss 1.0.8-0.2.el2, seamonkey-chat 1.0.8-0.2.el2, seamonkey-mail 1.0.8-0.2.el2, seamonkey-nspr 1.0.8-0.2.el2, seamonkey-js-debugger 1.0.8-0.2.el2, +1 more Red Hat Enterprise Linux WS version 3 seamonkey 1.0.8-0.2.el3, seamonkey-nss 1.0.8-0.2.el3, seamonkey-chat 1.0.8-0.2.el3, seamonkey-mail 1.0.8-0.2.el3, seamonkey-nspr 1.0.8-0.2.el3, seamonkey-js-debugger 1.0.8-0.2.el3, +1 more Red Hat Enterprise Linux WS version 4 devhelp 0.10-0.7.el4, seamonkey 1.0.8-0.2.el4, firefox 1.5.0.10-0.1.el4, seamonkey-chat 1.0.8-0.2.el4, seamonkey-mail 1.0.8-0.2.el4, thunderbird 1.5.0.10-0.1.el4, +2 more
    +1 more products
    Red Hat Linux Advanced Workstation 2.1 seamonkey 1.0.8-0.2.el2, seamonkey-nss 1.0.8-0.2.el2, seamonkey-chat 1.0.8-0.2.el2, seamonkey-mail 1.0.8-0.2.el2, seamonkey-nspr 1.0.8-0.2.el2, seamonkey-js-debugger 1.0.8-0.2.el2, +1 more
    fixed: vendor fix RHSA-2007:0077

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

Timeline

  1. Published
  2. First public exploit (EDB-3340)

Exploit prediction

12.52% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-3340 Mozilla Firefox 2.0.0.1 - 'location.hostname' Cross-Domain remote, 2007-02-20
  • lcamtuf.dione.cc http://lcamtuf.dione.cc/ffhostname.html 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

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

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.