{"id":"CVE-2026-104979","published":"2026-10-05T18:17:33.420","lastModified":"2026-10-05T20:17:10.243","description":"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.","cvssScore":8.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","cwes":["CWE-79","CWE-862"],"vendors":[],"products":[],"references":[{"url":"https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9287","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","tags":[]}],"exploitRefs":[{"url":"https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9287","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows any authenticated user to inject arbitrary HTML, leading to potential JavaScript execution and API token exfiltration when clicked by a project member or viewer.","exploitability":"Exploitation is relatively easy as it requires an authenticated user to plant a link in a project, and the target must click it. Precondition is that the project has a published DeployBoard with intake enabled.","blast_radius":"If exploited, the impact is high as it can lead to full API token exfiltration, potentially compromising the entire project and its members.","remediation":"Upgrade to Plane 1.4.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","web","html-injection","api-exfiltration"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-06T08:45:14.138Z"}}