FKIE_CVE-2007-4556
Vulnerability from fkie_nvd - Published: 2007-08-28 01:17 - Updated: 2026-06-16 22:44
Severity
Summary
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
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| opensymphony | xwork | * | |
| opensymphony | xwork | * |
{
"affected": [
{
"affectedData": [
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"product": "n/a",
"vendor": "n/a",
"versions": [
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"status": "affected",
"version": "n/a"
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],
"source": "cve@mitre.org"
}
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"configurations": [
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"cveTags": [],
"descriptions": [
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"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Struts apoyado en OpenSymphony XWork anterior a 1.2.3, y 2.x anterior a 2.0.4, tal y como se utiliza en WebWork y Apache Struts, recursivamente evalua todas las entradas como una expresi\u00f3n Object-Graph Navigation Language (OGNL) cuando altSyntax est\u00e1 activado, lo cual permite a atacantes remotos provocar denegaci\u00f3n de servicio (bucle infinito) o ejecutar c\u00f3digo de su elecci\u00f3n a trav\u00e9s de un formulario de entradad comenzando con una secuencia \"%{\" y finalizando con un caracter \"}\"."
}
],
"id": "CVE-2007-4556",
"lastModified": "2026-06-16T22:44:19.150",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": true,
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"source": "nvd@nist.gov",
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"published": "2007-08-28T01:17:00.000",
"references": [
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"tags": [
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"url": "http://forums.opensymphony.com/ann.jspa?annID=54"
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{
"source": "cve@mitre.org",
"tags": [
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"url": "http://issues.apache.org/struts/browse/WW-2030"
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"url": "http://struts.apache.org/2.x/docs/s2-001.html"
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"url": "http://wiki.opensymphony.com/display/WW/1.2.3+Press+Release"
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"url": "http://www.securityfocus.com/bid/25524"
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"url": "http://www.vupen.com/english/advisories/2007/3041"
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"tags": [
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"url": "http://www.vupen.com/english/advisories/2007/3042"
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{
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"tags": [
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"url": "http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050\u0026styleName=Html\u0026version=21701"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050\u0026styleName=Html\u0026version=21706"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "http://osvdb.org/37072"
},
{
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"tags": [
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"Third Party Advisory"
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"url": "http://struts.apache.org/2.x/docs/s2-001.html"
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],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
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"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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