SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install
Summary
| CVE | CVE-2026-62204 |
|---|---|
| State | PUBLISHED |
| Assigner | VulnCheck |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-22 13:16:39 UTC |
| Updated | 2026-08-22 13:16:39 UTC |
| Description | SiYuan versions before v3.7.4 fail to validate that packageName matches the downloaded package content in bazaar install endpoints. Attackers with same-origin access can overwrite existing trusted plugins by supplying mismatched packageName and repoURL parameters, achieving persistence across application restarts. |
Risk And Classification
Primary CVSS: v4.0 5.9 MEDIUM from [email protected]
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/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
Problem Types: CWE-345 | CWE-345 Insufficient Verification of Data Authenticity
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 5.9 | MEDIUM | CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/E:X/C... |
| 4.0 | CNA | CVSS | 5.9 | MEDIUM | CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L |
| 3.1 | [email protected] | Primary | 6.6 | MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L |
| 3.1 | CNA | CVSS | 6.6 | MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L |
CVSS v4.0 Breakdown
Attack Vector
LocalAttack Complexity
HighAttack Requirements
PresentPrivileges Required
LowUser Interaction
PassiveConfidentiality
LowIntegrity
HighAvailability
LowSub Conf.
LowSub Integrity
HighSub Availability
LowCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/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
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
HighPrivileges Required
LowUser Interaction
RequiredScope
ChangedConfidentiality
LowIntegrity
HighAvailability
LowCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Siyuan-note | Siyuan | affected 3.7.4 semver | Not specified |
| CNA | Siyuan-note | Siyuan | unaffected 3.7.4 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install | [email protected] | www.vulncheck.com | |
| github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: alham-rizvi (en)
There are currently no legacy QID mappings associated with this CVE.