CVE-2009-1725

CVE-2009-1725 is a critical-severity vulnerability in Apple Safari with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

• Severity: Critical (CVSS 2.0 base score 9.3)
• EPSS exploit prediction: 6% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-189
• Affected product: Apple Safari
• Published: 2009-07-09
• Last modified: 2026-06-16

Description

WebKit in Apple Safari before 4.0.2, as used on iPhone OS before 3.1, iPhone OS before 3.1.1 for iPod touch, and other platforms; KHTML in kdelibs in KDE; QtWebKit (aka Qt toolkit); and possibly other products do not properly handle numeric character references, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted HTML document.

Frequently asked questions

What is CVE-2009-1725?

WebKit in Apple Safari before 4.0.2, as used on iPhone OS before 3.1, iPhone OS before 3.1.1 for iPod touch, and other platforms; KHTML in kdelibs in KDE; QtWebKit (aka Qt toolkit); and possibly other products do not properly handle numeric character references, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted HTML document.

How severe is CVE-2009-1725?

CVE-2009-1725 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-1725 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1725?

CVE-2009-1725 primarily affects Apple Safari. In total, 53 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1725?

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

When was CVE-2009-1725 published?

CVE-2009-1725 was published on 2009-07-09 and last updated on 2026-06-16.

References

• http://lists.apple.com/archives/security-announce/2009/Jul/msg00000.html
• http://lists.apple.com/archives/security-announce/2009/Sep/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
• http://osvdb.org/55739
• http://secunia.com/advisories/35758
• http://secunia.com/advisories/36057
• http://secunia.com/advisories/36062
• http://secunia.com/advisories/36347
• http://secunia.com/advisories/36677
• http://secunia.com/advisories/36790
• http://secunia.com/advisories/37746
• http://secunia.com/advisories/43068
• http://support.apple.com/kb/HT3666
• http://support.apple.com/kb/HT3860
• http://websvn.kde.org/?view=rev&revision=1002162
• http://websvn.kde.org/?view=rev&revision=1002163
• http://websvn.kde.org/?view=rev&revision=1002164
• http://www.debian.org/security/2009/dsa-1950
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:330
• http://www.securityfocus.com/bid/35607
• http://www.securitytracker.com/id?1022526
• http://www.ubuntu.com/usn/USN-836-1
• http://www.ubuntu.com/usn/USN-857-1
• http://www.vupen.com/english/advisories/2009/1827
• http://www.vupen.com/english/advisories/2011/0212
• https://bugzilla.redhat.com/show_bug.cgi?id=513813
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5777
• https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00931.html
• https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00933.html
• https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01177.html

Affected products (53)

• cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.8:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.9:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.9.2:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.9.3:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.0b:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.1:beta:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.1b:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.2b:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.3b:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.0.4b:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.1.0b:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:3.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:4.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:4.0.0b:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.2:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.3:*:*:*:*:*:*:*

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