How severe is CVE-2008-1999?

CVE-2008-1999 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-1999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-1999?

CVE-2008-1999 affects Apple Safari. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-1999?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-1999 published?

CVE-2008-1999 was published on 2008-04-28 and last updated on 2026-06-16.

CVE-2008-1999

CVE-2008-1999 is a medium-severity vulnerability in Apple Safari with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Safari
Published: 2008-04-28
Last modified: 2026-06-16

Description

Apple Safari 3.1.1 allows remote attackers to spoof the address bar by placing many "invisible" characters in the userinfo subcomponent of the authority component of the URL (aka the user field), as demonstrated by %E3%80%80 sequences.

Frequently asked questions

What is CVE-2008-1999?: Apple Safari 3.1.1 allows remote attackers to spoof the address bar by placing many "invisible" characters in the userinfo subcomponent of the authority component of the URL (aka the user field), as demonstrated by %E3%80%80 sequences.
How severe is CVE-2008-1999?: CVE-2008-1999 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-1999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-1999?: CVE-2008-1999 affects Apple Safari. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-1999?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-1999 published?: CVE-2008-1999 was published on 2008-04-28 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apple:safari:3.1.1:*:*:*:*:*:*:*

More vulnerabilities in Apple Safari

CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2015-5780 — Critical (CVSS 10.0): The Safari Extensions implementation in Apple Safari before 9 does not require user confirmation before replacing an…
CVE-2014-1303 — Critical (CVSS 10.0): Heap-based buffer overflow in Apple Safari 7.0.2 allows remote attackers to execute arbitrary code and bypass a sandbox…
CVE-2014-1300 — Critical (CVSS 10.0): Unspecified vulnerability in Apple Safari 7.0.2 on OS X allows remote attackers to execute arbitrary code with root…
CVE-2011-3046 — Critical (CVSS 10.0): The extension subsystem in Google Chrome before 17.0.963.78 does not properly handle history navigation, which allows…
CVE-2010-3116 — Critical (CVSS 10.0): Multiple use-after-free vulnerabilities in WebKit, as used in Apple Safari before 4.1.3 and 5.0.x before 5.0.3, Google…

All CVEs affecting Apple Safari →