CVE-2007-4556: n/a vulnerability

CVE-2007-4556: Struts support in OpenSymphony XWork before 1.2.3, and 2.x before 2.0.4, as used in WebWork and Apache Stru...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 15:01 UTC (UTC+00:00)

Security readout for executives and security teams

This issue affects legacy Java web applications using OpenSymphony XWork with WebWork or Apache Struts. Unsafe expression evaluation of user input can let a remote attacker crash the application or potentially run code. The bundle does not show active exploitation, but affected internet-facing legacy systems should be treated seriously. Exposure is most likely in older Java web applications using WebWork, Apache Struts, or bundled OpenSymphony XWork versions below the fixed thresholds, especially where altSyntax is enabled and form input reaches Struts/XWork processing. Prioritize as a legacy application risk review. It is not listed as KEV in the bundle, but remote code execution potential means exposed affected systems deserve prompt validation and upgrade planning. Mitigation focus: Inventory applications for OpenSymphony XWork, WebWork, and Apache Struts dependencies.; Upgrade XWork 1.x to 1.2.3 or later where applicable.; Upgrade XWork 2.x to 2.0.4 or later where applicable..

Prepared: Jun 29, 2026, 03:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Aug 28, 2007, 01:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

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