CVE-2007-0981

CVE-2007-0981 is a high-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

• Severity: High (CVSS 2.0 base score 7.5)
• EPSS exploit prediction: 12% (96th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-264
• Affected product: Mozilla Firefox
• Published: 2007-02-16
• Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2007-0981?

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.

How severe is CVE-2007-0981?

CVE-2007-0981 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2007-0981 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-0981?

CVE-2007-0981 primarily affects Mozilla Firefox. In total, 51 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-0981?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2007-0981 published?

CVE-2007-0981 was published on 2007-02-16 and last updated on 2026-06-16.

References

• ftp://patches.sgi.com/support/free/security/advisories/20070202-01-P.asc
• ftp://patches.sgi.com/support/free/security/advisories/20070301-01-P.asc
• http://fedoranews.org/cms/node/2713
• http://fedoranews.org/cms/node/2728
• http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00771742
• http://lcamtuf.dione.cc/ffhostname.html
• http://lists.suse.com/archive/suse-security-announce/2007-Mar/0001.html
• http://rhn.redhat.com/errata/RHSA-2007-0077.html
• http://secunia.com/advisories/24175
• http://secunia.com/advisories/24205
• http://secunia.com/advisories/24238
• http://secunia.com/advisories/24287
• http://secunia.com/advisories/24290
• http://secunia.com/advisories/24293
• http://secunia.com/advisories/24320
• http://secunia.com/advisories/24328
• http://secunia.com/advisories/24333
• http://secunia.com/advisories/24342
• http://secunia.com/advisories/24343
• http://secunia.com/advisories/24384
• http://secunia.com/advisories/24393
• http://secunia.com/advisories/24395
• http://secunia.com/advisories/24437
• http://secunia.com/advisories/24455
• http://secunia.com/advisories/24457
• http://secunia.com/advisories/24650
• http://secunia.com/advisories/25588
• http://security.gentoo.org/glsa/glsa-200703-04.xml
• http://securityreason.com/securityalert/2262
• http://securitytracker.com/id?1017654

Affected products (51)

• cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.9:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.9:rc:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.9.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.9.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.9.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.10:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:0.10.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.6:*:linux:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5:beta1:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5:beta2:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:1.5.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:2.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:2.0:beta_1:*:*:*:*:*:*

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