{"cve":{"cve_id":"CVE-2021-24288","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":0.01939,"epss_percentile":0.77489,"epss_as_of":"2026-06-23","description":"When subscribing using AcyMailing, the 'redirect' parameter isn't properly sanitized. Turning the request from POST to GET, an attacker can craft a link containing a potentially malicious landing page and send it to the victim.","published_at":"2021-05-17T16:48:52Z","last_modified_at":null,"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":["CWE-601"],"nvd_references":["https://wpscan.com/vulnerability/56628862-1687-4862-9ed4-145d8dfbca97"],"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":"2026-06-28T23:15:09.865382Z"},"effective_severity":null,"badges":["poc"],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"acymailing","vendor_name":"AcyMailing","product_slug":"newsletter-via-smtp-sendinblue-sendgrid-mailgun-acymailing-smtp-newsletter","product_name":"Newsletter via SMTP, Sendinblue, Sendgrid, Mailgun - AcyMailing SMTP Newsletter","version_start":"7.5.0","version_start_inclusive":true,"version_end":"7.5.0","version_end_inclusive":false,"cpe23_uri":"cve5:acymailing:newsletter-via-smtp-sendinblue-sendgrid-mailgun-acymailing-smtp-newsletter:7.5.0:7.5.0"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-24288.yaml","title":"WordPress AcyMailing <7.5.0 - Open Redirect","author":"0x_Akoko","disclosed_at":null}],"news":[],"references":[{"url":"https://wpscan.com/vulnerability/56628862-1687-4862-9ed4-145d8dfbca97","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2021-05-17T16:48:52Z","label":"CVE published","source":null},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"}]}