{"schema":"threatline.record/2","record":{"id":"CVE-2026-104979","aliases":["GHSA-hh2r-3hwp-mvq3"],"summary":"Plane: Cross-tenant stored XSS in intake enables account takeover","details":"Plane is an open-source project management tool. Prior to 1.4.0, IntakeIssuePublicViewSet.create in Plane v1.3.1 writes description_html through Issue.objects.create(...) without calling validate_html_content from nh3. Any authenticated user, including a new user with no workspace memberships, can plant arbitrary HTML in a project that has a published DeployBoard with intake enabled. When a project member or viewer of a closed intake item clicks the planted link, the TipTap \\tjavascript: parser bypass and the target=\"_self\" click handler execute JavaScript in the viewer's session and exfiltrate a long-lived API token. This issue is fixed in 1.4.0.","categories":["Unclassified"],"product":"plane","vendor":"makeplane","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104979","source_modified_at":"2026-10-05T19:12:00.312Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"plane","vendor":"makeplane","versions":[{"status":"affected","version":"< 1.4.0"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","source_modified_at":"2026-10-05T17:48:59Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"other","name":"makeplane/plane"},"range":"<= 1.3.1"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","source_modified_at":"2026-10-05T17:48:59Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"other","name":"makeplane/plane"},"version":"1.4.0"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00359,"percentile":0.28458,"score_date":"2026-10-23"},"published_at":"2026-10-05T17:49:53.030Z","modified_at":"2026-10-05T19:12:00.312Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104979","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-05T19:12:00.312Z"},{"source":"GitHub Advisory Database","url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","fetched_at":"2026-10-23T19:58:35.668311Z","source_modified_at":"2026-10-05T17:48:59Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104979","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/pull/9287","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-10-05T19:11:49.930509Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-05T19:12:00.312Z","content_hash":"7a7fb6490d8acde93cfc0502c472425e9cc9f4e200dd50387e182deb7e48663e"}}