{"id":"GHSA-4r66-7rcv-x46x","aliases":["GO-2025-4219"],"status":"published","title":"SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin","description":"### Summary\nSiyuan is vulnerable to RCE. The issue stems from a \"Zip Slip\" vulnerability during zip file extraction, combined with the ability to overwrite system executables and subsequently trigger their execution.\n\n### Steps to reproduce\n1. Authenticate\n2. Create zip slip payload with path traversal entry `../../../../opt/siyuan/startup.sh`. startup.sh contains malicious code like:\n```bash\n#!/bin/sh\necho 'you have been pwned' \u003e /siyuan/workspace/data/pwned.txt\necho \"pandoc 3.1.0\"\n```\n3. Upload zip to workspace via `/api/file/putFile`\n4. Extract zip via `/api/archive/unzip`, overwrites the existing executable `startup.sh` while maintaining the +x permission\n5. Trigger execution by calling `/api/setting/setExport` with `pandocBin=/opt/siyuan/startup.sh`. This calls `IsValidPandocBin()` which executes `startup.sh --version` that outputs \"pandoc 3.1.0\" and executes any arbitrary malicious code","severity":{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2025-12-09T17:18:16Z","modified":"2026-03-03T04:57:48Z","affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.0.0-20251202123337-6ef83b42c7ce"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.0.0-20251202123337-6ef83b42c7ce"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/siyuan-note/siyuan/kernel","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]}],"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4r66-7rcv-x46x","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-4r66-7rcv-x46x"},{"url":"https://github.com/siyuan-note/siyuan","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-4r66-7rcv-x46x","title":"SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin","description":"### Summary\nSiyuan is vulnerable to RCE. The issue stems from a \"Zip Slip\" vulnerability during zip file extraction, combined with the ability to overwrite system executables and subsequently trigger their execution.\n\n### Steps to reproduce\n1. Authenticate\n2. Create zip slip payload with path traversal entry `../../../../opt/siyuan/startup.sh`. startup.sh contains malicious code like:\n```bash\n#!/bin/sh\necho 'you have been pwned' \u003e /siyuan/workspace/data/pwned.txt\necho \"pandoc 3.1.0\"\n```\n3. Upload zip to workspace via `/api/file/putFile`\n4. Extract zip via `/api/archive/unzip`, overwrites the existing executable `startup.sh` while maintaining the +x permission\n5. Trigger execution by calling `/api/setting/setExport` with `pandocBin=/opt/siyuan/startup.sh`. This calls `IsValidPandocBin()` which executes `startup.sh --version` that outputs \"pandoc 3.1.0\" and executes any arbitrary malicious code","status":"published","published":"2025-12-09T17:18:16Z","modified":"2025-12-09T17:18:17Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:39:12.222121Z"}],"osv":[{"id":"GHSA-4r66-7rcv-x46x","title":"SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin","description":"### Summary\nSiyuan is vulnerable to RCE. The issue stems from a \"Zip Slip\" vulnerability during zip file extraction, combined with the ability to overwrite system executables and subsequently trigger their execution.\n\n### Steps to reproduce\n1. Authenticate\n2. Create zip slip payload with path traversal entry `../../../../opt/siyuan/startup.sh`. startup.sh contains malicious code like:\n```bash\n#!/bin/sh\necho 'you have been pwned' \u003e /siyuan/workspace/data/pwned.txt\necho \"pandoc 3.1.0\"\n```\n3. Upload zip to workspace via `/api/file/putFile`\n4. Extract zip via `/api/archive/unzip`, overwrites the existing executable `startup.sh` while maintaining the +x permission\n5. Trigger execution by calling `/api/setting/setExport` with `pandocBin=/opt/siyuan/startup.sh`. This calls `IsValidPandocBin()` which executes `startup.sh --version` that outputs \"pandoc 3.1.0\" and executes any arbitrary malicious code","status":"published","published":"2025-12-09T17:18:16Z","modified":"2025-12-15T20:41:18.29756Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:37.528068Z"},{"id":"GO-2025-4219","title":"SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin in github.com/siyuan-note/siyuan/kernel","description":"SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin in github.com/siyuan-note/siyuan/kernel","status":"published","published":"2025-12-15T20:15:46Z","modified":"2026-03-03T04:57:48.451263Z","updated_at":"2026-11-02T15:47:02.011123Z"}]}}