CVE-2007-4556

medium

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.

References

Advisories
More

http://www.vupen.com/english/advisories/2007/3042

http://www.vupen.com/english/advisories/2007/3041

http://www.securityfocus.com/bid/25524

http://struts.apache.org/2.x/docs/s2-001.html

http://secunia.com/advisories/26694

http://secunia.com/advisories/26693

http://secunia.com/advisories/26681

http://issues.apache.org/struts/browse/WW-2030

http://wiki.opensymphony.com/display/WW/1.2.3+Press+Release

http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21706

http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21701

http://jira.opensymphony.com/browse/XW-544

http://forums.opensymphony.com/ann.jspa?annID=54

Details

Source: Mitre, NVD

Published: 2007-08-28

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 6.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Severity: Medium

EPSS

EPSS: 0.25749