How severe is CVE-2008-6504?

CVE-2008-6504 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-6504 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 39% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-6504?

CVE-2008-6504 primarily affects Opensymphony Xwork. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-6504?

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

When was CVE-2008-6504 published?

CVE-2008-6504 was published on 2009-03-23 and last updated on 2026-06-16.

CVE-2008-6504

CVE-2008-6504 is a medium-severity vulnerability in Opensymphony Xwork with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 39% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 39% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Opensymphony Xwork
Published: 2009-03-23
Last modified: 2026-06-16

Description

ParametersInterceptor in OpenSymphony XWork 2.0.x before 2.0.6 and 2.1.x before 2.1.2, as used in Apache Struts and other products, does not properly restrict # (pound sign) references to context objects, which allows remote attackers to execute Object-Graph Navigation Language (OGNL) statements and modify server-side context objects, as demonstrated by use of a \u0023 representation for the # character.

Frequently asked questions

What is CVE-2008-6504?: ParametersInterceptor in OpenSymphony XWork 2.0.x before 2.0.6 and 2.1.x before 2.1.2, as used in Apache Struts and other products, does not properly restrict # (pound sign) references to context objects, which allows remote attackers to execute Object-Graph Navigation Language (OGNL) statements and modify server-side context objects, as demonstrated by use of a \u0023 representation for the # character.
How severe is CVE-2008-6504?: CVE-2008-6504 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-6504 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 39% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-6504?: CVE-2008-6504 primarily affects Opensymphony Xwork. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-6504?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-6504 published?: CVE-2008-6504 was published on 2009-03-23 and last updated on 2026-06-16.

References

Affected products (20)

cpe:2.3:a:opensymphony:xwork:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:opensymphony:xwork:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:opensymphony:xwork:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:opensymphony:xwork:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:opensymphony:xwork:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:opensymphony:xwork:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:opensymphony:xwork:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:opensymphony:xwork:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.11.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.11.2:*:*:*:*:*:*:*

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