{"items":[{"id":"NVI-00004888","kind":"vulnerability","title":"Silverstripe CMS malicious file upload enables script execution","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-h77w-655f-6j3m","CVE-2020-9309"],"plain_summary":"OSV carries this publisher advisory for silverstripe/cms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2a414958c00c3c7098b97505e382f2ce"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-17T03:27:44.233Z","value":"6.8 MEDIUM (2.0)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-e18f2215c578eb55641da27657053cd7"},{"kind":"CVSS","as_of":"2026-06-17T03:27:44.233Z","value":"8.8 HIGH (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-e18f2215c578eb55641da27657053cd7"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"1.837%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.78954. Missing scores are unknown.","source_id":"sr-2a414958c00c3c7098b97505e382f2ce"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-779a04161b180b0db89cb0e679dd2e13","url":"https://github.com/advisories/GHSA-h77w-655f-6j3m","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-h77w-655f-6j3m","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.426Z"},{"id":"sr-e18f2215c578eb55641da27657053cd7","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9309","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2020-9309","publisher":"NIST National Vulnerability Database","observed_at":"2026-10-31T22:07:28.883Z"},{"id":"sr-2a414958c00c3c7098b97505e382f2ce","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2020-9309","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:03.704Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-779a04161b180b0db89cb0e679dd2e13"],"technology":"silverstripe/cms","known_exclusions":[],"conditions_summary":"Silverstripe CMS through 4.5 can be susceptible to script execution from malicious upload contents under allowed file extensions (for example HTML code in a TXT file). When these files are stored as protected or draft files, the MIME detection can cause browsers to execute the file contents. Uploads stored as protected or draft files are allowed by default for authorised users only, but can also be enabled through custom logic as well as modules such as silverstripe/userforms. Sites using the previously optional silverstripe/mimevalidator module can configure MIME whitelists rather than extension whitelists, and hence prevent this issue. Sites on the Common Web Platform (CWP) use this module by default, and are not affected.","public_affected_ranges":["ECOSYSTEM: introduced 0; last_affected 4.5.0"]}],"null_published_at":"2026-10-31T22:27:12.423Z","source_updated_at":"2024-02-16T08:05:16.386Z","source_disclosed_at":"2022-05-24T17:23:42.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:20.426Z"},{"id":"NVI-00004888","kind":"vulnerability","title":"Silverstripe CMS malicious file upload enables script execution","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-h77w-655f-6j3m","CVE-2020-9309"],"plain_summary":"OSV carries this publisher advisory for silverstripe/cms. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-779a04161b180b0db89cb0e679dd2e13"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-779a04161b180b0db89cb0e679dd2e13","url":"https://github.com/advisories/GHSA-h77w-655f-6j3m","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-h77w-655f-6j3m","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.426Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-779a04161b180b0db89cb0e679dd2e13"],"technology":"silverstripe/cms","known_exclusions":[],"conditions_summary":"Silverstripe CMS through 4.5 can be susceptible to script execution from malicious upload contents under allowed file extensions (for example HTML code in a TXT file). When these files are stored as protected or draft files, the MIME detection can cause browsers to execute the file contents. Uploads stored as protected or draft files are allowed by default for authorised users only, but can also be enabled through custom logic as well as modules such as silverstripe/userforms. Sites using the previously optional silverstripe/mimevalidator module can configure MIME whitelists rather than extension whitelists, and hence prevent this issue. Sites on the Common Web Platform (CWP) use this module by default, and are not affected.","public_affected_ranges":["ECOSYSTEM: introduced 0; last_affected 4.5.0"]}],"null_published_at":"2026-10-31T22:12:57.146Z","source_updated_at":"2024-02-16T08:05:16.386Z","source_disclosed_at":"2022-05-24T17:23:42.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:42:20.426Z"}],"next_cursor":null,"snapshot_revision":"42594"}