SiYuan CVE-2026-73050
CRITICALSeverity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Authenticated editor injects the payload (PR:L) and a separate victim must render the view (UI:R); the XSS crosses into the victim's context (S:C) with high confidentiality/integrity impact but no direct availability effect.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
SiYuan versions before v3.7.4 fail to validate or escape the color field in attribute-view select options, allowing stored cross-site scripting through eight unescaped render sites. Attackers can inject event-handler attributes by including quotation marks in the color value, executing arbitrary JavaScript when viewing databases containing the malicious select field.
AnalysisAI
Stored cross-site scripting in SiYuan before v3.7.4 lets a workspace user with edit rights persist JavaScript by injecting event-handler attributes through the unescaped color field of an attribute-view (database) select option. The payload fires whenever any user renders a database containing the malicious select field, across eight distinct render sites that all fail to escape the value. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated user with permission to create or modify an attribute-view (database) select option (PR:L), the ability to set the option's color field to a value containing a quotation mark to break out into an event-handler attribute, and a victim who subsequently views a document/database containing that malicious select field (UI:P - passive interaction, simply rendering the view). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H, 9.4) reflects a network-reachable, low-complexity attack needing only low privileges (an authenticated editing user) and passive victim interaction (opening the affected database view). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with editing access to a shared SiYuan workspace creates or edits a database (attribute view) select column and sets an option's color to a value containing a quote plus an event handler that runs JavaScript. When a colleague or admin later opens a document containing that database, the payload executes in their session, enabling actions such as exfiltrating workspace content or performing requests as the victim. … |
| Remediation | Upgrade to SiYuan v3.7.4 or later, which escapes the select-option color field at all affected render sites (Vendor-released patch: v3.7.4), per GHSA-m7cc-jh9q-wxg8 (https://github.com/siyuan-note/siyuan/security/advisories/GHSA-m7cc-jh9q-wxg8). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all SiYuan instances and document versions (vulnerable if before v3.7.4), restrict database edit permissions to essential personnel only, and disable non-critical database sharing. …
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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