{"id":"CVE-2021-26835","details":"No filtering of cross-site scripting (XSS) payloads in the markdown-editor in Zettlr 1.8.7 allows attackers to perform remote code execution via a crafted file.","modified":"2026-07-08T22:13:39.873896Z","published":"2021-06-18T12:15:08.040Z","references":[{"type":"ADVISORY","url":"https://github.com/Zettlr/Zettlr/releases/tag/v1.8.9"},{"type":"FIX","url":"https://github.com/Zettlr/Zettlr/issues/1716"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zettlr/zettlr","events":[{"introduced":"0e80c56063884f769349cb21f0712b12e97f9d4b"},{"last_affected":"0e80c56063884f769349cb21f0712b12e97f9d4b"},{"fixed":"9fba1b08998c029dba9054e766e3c69c4a8028a6"}],"database_specific":{"extracted_events":[{"introduced":"1.8.7"},{"last_affected":"1.8.7"}],"source":["CPE_STRING","REFERENCES"],"cpe":"cpe:2.3:a:zettlr:zettlr:1.8.7:*:*:*:*:*:*:*"}}],"versions":["1.8.7","v1.8.8","v1.8.7"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26835.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}