CVE-2009-2704: CA SiteMinder allows remote attackers to bypass cross-site scripting (XSS) protections for J2EE applications v

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MEDIUM 4.3MITIGATE

CVE-2009-2704 is a medium-severity flaw (CVSS 4.3) affecting j2ee. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CA SiteMinder allows remote attackers to bypass cross-site scripting (XSS) protections for J2EE applications via a request containing a %00 (encoded null byte).

Why this priority

EPSS top 10%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	3.9% (top 10%)
CISA exploited list	No
Weakness	CWE-264
Published	2009-08-11
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: sun

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2009-08-11 10:30 UTCPublished CVE record published
2026-06-16 23:10 UTCUpdated Record last modified

sun j2ee MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy j2ee || rpm -q j2ee || j2ee --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Computer Associates SiteMinder - '%00' Cross-Site Scripting Protection Security Bypass

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2009-2704?

j2ee: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2009-2704 being exploited?

CVE-2009-2704 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2009-2704 affect?

CVE-2009-2704 affects j2ee. Severity is medium (CVSS 4.3). CA SiteMinder allows remote attackers to bypass cross-site scripting (XSS) protections for J2EE applications via a request containing a %00 (encoded null byte).

How urgent is CVE-2009-2704?

Priority 43/100. EPSS top 10%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2009-2705 MEDIUM 4.3 MITIGATE MITIGATE CA SiteMinder allows remote attackers to bypass cross-site scripting (XSS) protections for J2EE applications v
CVE-2003-1573 HIGH 10.0 DOWNGRADE The PointBase 4.6 database component in the J2EE 1.4 reference implementation (J2EE/RI) allows remote attacker

References

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