{"id":"CVE-2020-5298","aliases":["GHSA-gg6x-xx78-448c"],"url":"https://o3.security/vulnerability/CVE-2020-5298","summary":"Reflected XSS when importing CSV in OctoberCMS","details":"### Impact\nA user with the ability to use the import functionality of the `ImportExportController` behavior could be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question\n\n### Patches\nIssue has been patched in Build 466 (v1.0.466).\n\n### Workarounds\nApply https://github.com/octobercms/october/commit/cd0b6a791f995d86071a024464c1702efc50f46c to your installation manually if unable to upgrade to Build 466.\n\n### References\nReported by [Sivanesh Ashok](https://stazot.com/)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\n\n### Threat assessment:\n<img width=\"1100\" alt=\"Screen Shot 2020-03-31 at 2 01 52 PM\" src=\"https://user-images.githubusercontent.com/7253840/78070158-8f7ef580-7358-11ea-950c-226533f6a0a3.png\">","published":"2020-06-03T22:15:11.847Z","modified":"2026-10-20T10:53:28.687229920Z","cvss":{"score":4.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00909,"percentile":0.5681,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"Packagist","name":"october/backend","fixedVersion":"1.0.466"}],"fix":{"url":"https://github.com/octobercms/october/commit/cd0b6a791f995d86071a024464c1702efc50f46c","label":"octobercms/october@cd0b6a7"},"references":[{"type":"FIX","url":"https://github.com/octobercms/october/commit/cd0b6a791f995d86071a024464c1702efc50f46c"},{"type":"FIX","url":"https://github.com/octobercms/october/security/advisories/GHSA-gg6x-xx78-448c"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html"},{"type":"EVIDENCE","url":"http://seclists.org/fulldisclosure/2020/Aug/2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5298"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-20T10:53:28.687229920Z"}}