CVE-2008-5503

CVE-2008-5503 is a low-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

The loadBindingDocument function in Mozilla Firefox 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 does not perform any security checks related to the same-domain policy, which allows remote attackers to read or access data from other domains via crafted XBL bindings.

Frequently asked questions

What is CVE-2008-5503?
The loadBindingDocument function in Mozilla Firefox 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 does not perform any security checks related to the same-domain policy, which allows remote attackers to read or access data from other domains via crafted XBL bindings.
How severe is CVE-2008-5503?
CVE-2008-5503 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-2008-5503 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5503?
CVE-2008-5503 primarily affects Mozilla Firefox. In total, 54 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-5503?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-5503 published?
CVE-2008-5503 was published on 2008-12-17 and last updated on 2026-06-16.

References

Affected products (54)

More vulnerabilities in Mozilla Firefox

All CVEs affecting Mozilla Firefox →