{"action":"Upgrade concrete5/concrete5 to 9.5.1 or later.","affected":[{"fixed":"9.5.1","introduced":"0"}],"component":"concrete5/concrete5","cve_ids":["CVE-2026-7890"],"ecosystem":"Packagist","epss":0.00152,"exploited":false,"fixed_versions":["9.5.1"],"ghsa_id":"GHSA-gjwq-9v8p-47w7","id":"tcs_01M5KF2VJZS7HJ35KKJ1T8HPCT","modified_at":"2026-09-10T03:51:05.798827640Z","published_at":"2026-05-22T00:31:16Z","references":["https://osv.dev/vulnerability/GHSA-gjwq-9v8p-47w7","https://nvd.nist.gov/vuln/detail/CVE-2026-7890","https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes","https://github.com/concretecms/concretecms"],"severity":{"label":"medium","score":6.4},"sources":[{"source":"osv","source_id":"GHSA-gjwq-9v8p-47w7","url":"https://osv.dev/vulnerability/GHSA-gjwq-9v8p-47w7"},{"source":"nvd","source_id":"CVE-2026-7890","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7890"}],"summary":"Concrete CMS's RSS Displayer block accepts a feed URL from any page editor and fetches it server-side without validation"}