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Vulnerability record · CVE-2008-6504 · published 23 March 2009

CVE-2008-6504: Opensymphony xwork improper input validation vulnerability

OOpensymphony · Xwork

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.

5.0 CVSS 2.0 Medium EPSS 37% · top 1.6% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
22References, 6 tagged exploit
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://fisheye6.atlassian.com/cru/CR-9/ Patch
http://issues.apache.org/struts/browse/WW-2692 Exploit
http://jira.opensymphony.com/browse/XW-641 Exploit
http://osvdb.org/49732
http://secunia.com/advisories/32495 Vendor Advisory
http://secunia.com/advisories/32497 Vendor Advisory
http://struts.apache.org/2.x/docs/s2-003.html Exploit
http://www.securityfocus.com/bid/32101
http://www.vupen.com/english/advisories/2008/3003 Vendor Advisory
http://www.vupen.com/english/advisories/2008/3004
https://exchange.xforce.ibmcloud.com/vulnerabilities/46328
http://fisheye6.atlassian.com/cru/CR-9/ Patch
http://issues.apache.org/struts/browse/WW-2692 Exploit
http://jira.opensymphony.com/browse/XW-641 Exploit
http://osvdb.org/49732
http://secunia.com/advisories/32495 Vendor Advisory
http://secunia.com/advisories/32497 Vendor Advisory
http://struts.apache.org/2.x/docs/s2-003.html Exploit
http://www.securityfocus.com/bid/32101
http://www.vupen.com/english/advisories/2008/3003 Vendor Advisory
http://www.vupen.com/english/advisories/2008/3004
https://exchange.xforce.ibmcloud.com/vulnerabilities/46328

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2008-6504), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.