The Sun Java Plugin capability in Java 2 Runtime Environment (JRE) 1.4.2_01, 1.4.2_04, and possibly earlier versions, does not properly restrict access between Javascript and Java applets during data transfer, which allows remote attackers to load unsafe classes and execute arbitrary code by using the reflection API to access private Java packages.
CVE-2004-1029
- No confirmed exploitation signals yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EPSS
- 96.7%
- KEV
- Not listed
Published
March 1, 2005
Last Modified
June 16, 2026
References (30)
- cve@mitrehttp://jouko.iki.fi/adv/javaplugin.html
- cve@mitrehttp://lists.apple.com/archives/security-announce/2005/Feb/msg00000.html
- cve@mitrehttp://rpmfind.net/linux/RPM/suse/updates/9.3/i386/rpm/i586/java-1_4_2-sun-src-1.4.2.08-0.1.i586.html
- cve@mitrehttp://secunia.com/advisories/13271
- cve@mitrehttp://secunia.com/advisories/29035
- cve@mitrehttp://securityreason.com/securityalert/61
- cve@mitrehttp://sunsolve.sun.com/search/document.do?assetkey=1-26-101523-1
- cve@mitrehttp://sunsolve.sun.com/search/document.do?assetkey=1-26-57591-1
- cve@mitrehttp://www-1.ibm.com/support/docview.wss?uid=swg21257249
- cve@mitrehttp://www.idefense.com/application/poi/display?id=158&type=vulnerabilities
- cve@mitrehttp://www.kb.cert.org/vuls/id/760344
- cve@mitrehttp://www.securityfocus.com/bid/12317
- cve@mitrehttp://www.vupen.com/english/advisories/2008/0599
- cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/18188
- cve@mitrehttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5674
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 22× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-13 06:07 UTCEPSS rescore
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- 2026-06-10 22:13 UTCEPSS rescore
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- 2026-06-05 06:07 UTCEPSS rescore
- 2026-06-04 13:09 UTCEPSS rescore
- 2026-06-02 20:10 UTCEPSS rescore
- 2026-05-31 22:28 UTCEPSS rescore
- 2026-05-31 14:17 UTCEG score recompute
- 2026-05-31 14:17 UTCGHSA enrichment
- 2026-05-31 00:13 UTCEPSS rescore
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- 2026-05-29 13:40 UTCEPSS rescore
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- 2026-05-28 13:42 UTCEPSS rescore
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- 2026-05-18 21:29 UTCEPSS rescore
- 2026-05-18 21:29 UTCEPSS rescore
Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Exploit-DBEDB-24763✓ verifiedFirst seen Nov 22, 2004
Sun Java Runtime Environment 1.x Java Plugin - JavaScript Security Restriction Bypass
Open source ↗
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2004-1029?
When was CVE-2004-1029 disclosed?
Is CVE-2004-1029 actively exploited?
How do I remediate CVE-2004-1029?
Dependency Blast Radius
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