{"id":"GHSA-r294-2894-92j3","aliases":[],"url":"https://o3.security/vulnerability/GHSA-r294-2894-92j3","summary":"OpenClaw has stored XSS in exported session HTML viewer via markdown/raw-HTML rendering","details":"## Summary\n\nThe exported session HTML viewer allowed stored XSS when untrusted session content included raw HTML markdown tokens or unescaped metadata fields.\n\n## Impact\n\nOpening a crafted exported HTML session could execute attacker-controlled JavaScript in the viewer context. This can expose session content in the page and enable phishing or UI spoofing in the trusted export view.\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Affected versions: `<= 2026.2.22-2`\n- Patched version (released): `>= 2026.2.23`\n\n## Technical Details\n\nThe exporter rendered markdown with `marked.parse(...)` and inserted HTML via `innerHTML`, but did not override the `html` renderer token path. Raw HTML (for example `<img ... onerror=...>`) was passed through. Additional tree/header metadata fields were interpolated without escaping in the export template.\n\n## Reproduction\n\n1. Create a session containing content like `<img src=x onerror=alert(1)>`.\n2. Export the session to HTML.\n3. Open the exported file.\n4. Observe script execution from injected content.\n\n## Remediation\n\n- Added a `marked` `html(token)` renderer override that escapes raw HTML tokens.\n- Escaped previously unescaped tree/header metadata fields in the export template.\n- Added image MIME sanitization for exported data-URL image rendering.\n- Added regression tests for markdown/token and metadata escaping paths.\n\n## Fix Commit(s)\n\n- `f8524ec77a3999d573e6c6b8a5055bf35c49a2e6`\n\n## Release Process Note\n\n`patched_versions` is pre-set to the released version (`>= 2026.2.23`). This advisory now reflects released fix version `2026.2.23`.\n\nOpenClaw thanks @allsmog for reporting.","published":"2026-03-03T22:09:26Z","modified":"2026-03-04T15:16:22.593407Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"openclaw","fixedVersion":"2026.2.23"}],"fix":{"url":"https://github.com/openclaw/openclaw/commit/f8524ec77a3999d573e6c6b8a5055bf35c49a2e6","label":"openclaw/openclaw@f8524ec"},"references":[{"type":"WEB","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-r294-2894-92j3"},{"type":"WEB","url":"https://github.com/openclaw/openclaw/commit/f8524ec77a3999d573e6c6b8a5055bf35c49a2e6"},{"type":"PACKAGE","url":"https://github.com/openclaw/openclaw"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-03-04T15:16:22.593407Z"}}