{"cve":{"cve_id":"CVE-2007-4556","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.25749,"epss_percentile":0.97696,"epss_as_of":"2026-06-23","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.","published_at":"2007-08-28T01:00:00Z","last_modified_at":"2026-06-16T22:44:19.150000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["http://www.securityfocus.com/bid/25524","http://jira.opensymphony.com/browse/XW-544","http://issues.apache.org/struts/browse/WW-2030","http://www.vupen.com/english/advisories/2007/3041","http://forums.opensymphony.com/ann.jspa?annID=54","http://www.vupen.com/english/advisories/2007/3042","http://secunia.com/advisories/26693","http://secunia.com/advisories/26681","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://osvdb.org/37072","http://struts.apache.org/2.x/docs/s2-001.html","http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21701","http://secunia.com/advisories/26694"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:04:08.465798Z"},"effective_severity":null,"badges":["poc"],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"opensymphony","vendor_name":"opensymphony","product_slug":"xwork","product_name":"xwork","version_start":null,"version_start_inclusive":null,"version_end":"1.2.3","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:opensymphony:xwork:*:*:*:*:*:*:*:*"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2007/CVE-2007-4556.yaml","title":"OpenSymphony XWork/Apache Struts2 - Remote Code Execution","author":"pikpikcu","disclosed_at":null}],"news":[],"references":[{"url":"http://www.securityfocus.com/bid/25524","source_type":"MISC","tags":[]},{"url":"http://jira.opensymphony.com/browse/XW-544","source_type":"MISC","tags":[]},{"url":"http://issues.apache.org/struts/browse/WW-2030","source_type":"MISC","tags":[]},{"url":"http://www.vupen.com/english/advisories/2007/3041","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://forums.opensymphony.com/ann.jspa?annID=54","source_type":"MISC","tags":[]},{"url":"http://www.vupen.com/english/advisories/2007/3042","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://secunia.com/advisories/26693","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://secunia.com/advisories/26681","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://wiki.opensymphony.com/display/WW/1.2.3+Press+Release","source_type":"MISC","tags":[]},{"url":"http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21706","source_type":"MISC","tags":[]},{"url":"http://osvdb.org/37072","source_type":"MISC","tags":[]},{"url":"http://struts.apache.org/2.x/docs/s2-001.html","source_type":"MISC","tags":[]},{"url":"http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21701","source_type":"MISC","tags":[]},{"url":"http://secunia.com/advisories/26694","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2007-08-28T01:00:00Z","label":"CVE published","source":null},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"}]}