What is CVE-2009-1233?

CVE-2009-1233 is a vulnerability in Apple Safari, classified under Improper Input Validation. Published 2009-04-02.

Is CVE-2009-1233 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Apple Safari

CVE-2009-1233

Apple Safari 3.2.2 and 4 Beta on Windows allows remote attackers to cause a denial of service (application crash) via an XML document containing many nested A elements.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2009-04-02 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.044 (91.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000

Affected products

Apple Safari — versions 3.2.2, 4
Microsoft Windows

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

ahmedobied/python-exploits

References

www.exploit-db.com/exploits/8325 (exploit)
exchange.xforce.ibmcloud.com/vulnerabilities/49527 (vdb-entry)
www.securityfocus.com/bid/34318 (vdb-entry)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:5559 (signature, vdb-entry)

Frequently asked questions

What is CVE-2009-1233?: CVE-2009-1233 is a vulnerability in Apple Safari, classified under Improper Input Validation. Published 2009-04-02.
Is CVE-2009-1233 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.