vulnerability / NVI-00017622 / Revision 1
SiYuan: Stored XSS to RCE via attribute-view cell rendering in genAVValueHTML()
GitHub lists this reviewed advisory for github.com/siyuan-note/siyuan/kernel. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
9.9 critical
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
github.com/siyuan-note/siyuan/kernel
source listed< 0.0.0-20260628153353-2d5d72223df4
### Summary The attribute-view (database) cell renderer `genAVValueHTML` interpolates cell content raw in four of its branches: `text`, `url`, `phone`, and `mAsset`. A cell value like `` or `">` breaks out of its surrounding tag and runs arbitrary JavaScript in the renderer when the victim opens the block-attribute panel. On Electron desktop the renderer runs with `nodeIntegration:true`, so the XSS chains to host RCE via `require('child_process')`. AV files live under the workspace and ride normal sync, so an attacker with write access to any synced workspace plants the payload once and it fires on every device that opens a panel containing that row. The kernel doesn't escape on the way in either, so the malicious cell persists byte-for-byte. There's no equivalent of the `html.EscapeAttrVal` call that protects block IAL attributes at `kernel/model/blockial.go:261`. Companion advisory: GHSA-mvjr-vv3c-w4qv. Same workspace-sync to renderer-sink to Electron-RCE pattern in the CSS-snippet renderer, different sink file. Worth auditing for the same pattern in other renderers that pull from synced workspace data. ### Details
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-5xfx-xj4h-5p7r ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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