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CVE-2007-4556

Published: Aug 28, 2007Updated: Apr 23, 2026 Sources: CVE List NVD GHSANVD-CWE-Other
NVD MITRE
6.8CVSSMEDIUM
EPSS Score
25.7%
Top 2.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
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Description

Struts support in OpenSymphony XWork before 1.2.3, and 2.x before 2.0.4, as used in WebWork and Apache Struts, recursively evaluates all input as an Object-Graph Navigation Language (OGNL) expression when altSyntax is enabled, which allows remote attackers to cause a denial of service (infinite loop) or execute arbitrary code via form input beginning with a "%{" sequence and ending with a "}" character.

CVSS Vector Breakdown

AV:NAC:MAu:NC:PI:PA:P
Exploitability
AV:NAccess Vector
Network
AC:MAccess Complexity
Medium
Au:NAuthentication
None
Impact
C:PConfidentiality
Partial
I:PIntegrity
Partial
A:PAvailability
Partial
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Weaknesses

NVD-CWE-Other

Affected Products

n/an/a
opensymphony:xworkMavenOSS Libraries
xworkopensymphony
On-prem
OSS Libraries / web-framework
mavenpackage-ecosystemOSS Libraries
opensymphonyoss-projectOSS Libraries

Exploitability

Official Patch Available

References

http://www.securityfocus.com/bid/25524
securityfocus.com
http://jira.opensymphony.com/browse/XW-544
jira.opensymphony.com
http://issues.apache.org/struts/browse/WW-2030
issues.apache.org
and 12 more references View all →

Timeline

Published
Aug 28, 2007
Last Updated
Apr 23, 2026

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