{"cve":{"cve_id":"CVE-2021-21708","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":0.03002,"epss_percentile":0.85627,"epss_as_of":"2026-06-23","description":"In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.","published_at":"2022-02-27T08:00:12.018000Z","last_modified_at":null,"cvss_v3_score":8.2,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","cvss_v3_severity":"HIGH","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":["CWE-416"],"nvd_references":["https://bugs.php.net/bug.php?id=81708","https://security.netapp.com/advisory/ntap-20220325-0004/","https://security.gentoo.org/glsa/202209-20"],"vuln_status":null,"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":"2026-06-28T23:14:59.637969Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"L","value_label":"Low"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"php-group","vendor_name":"PHP Group","product_slug":"php","product_name":"PHP","version_start":"7.4.x","version_start_inclusive":true,"version_end":"7.4.28","version_end_inclusive":false,"cpe23_uri":"cve5:php-group:php:7.4.x:7.4.28"},{"vendor_slug":"php-group","vendor_name":"PHP Group","product_slug":"php","product_name":"PHP","version_start":"8.0.X","version_start_inclusive":true,"version_end":"8.0.16","version_end_inclusive":false,"cpe23_uri":"cve5:php-group:php:8.0.X:8.0.16"},{"vendor_slug":"php-group","vendor_name":"PHP Group","product_slug":"php","product_name":"PHP","version_start":"8.1.X","version_start_inclusive":true,"version_end":"8.1.3","version_end_inclusive":false,"cpe23_uri":"cve5:php-group:php:8.1.X:8.1.3"}],"exploit_refs":[],"news":[],"references":[{"url":"https://bugs.php.net/bug.php?id=81708","source_type":"MISC","tags":[]},{"url":"https://security.netapp.com/advisory/ntap-20220325-0004/","source_type":"MISC","tags":[]},{"url":"https://security.gentoo.org/glsa/202209-20","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2022-02-27T08:00:12.018000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:05:11.212102Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:05:11.212102Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:05:11.212102Z","label":"CVSS score revised","source":"cvelistv5"}]}