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.
Published: 2026-08-22
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 26 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 23 Aug 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Siyuan
Siyuan siyuan
Vendors & Products Siyuan
Siyuan siyuan

Sat, 22 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
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.
Title SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install
First Time appeared B3log
B3log siyuan
Weaknesses CWE-345
CPEs cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*
Vendors & Products B3log
B3log siyuan
References
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L'}

cvssV4_0

{'score': 5.9, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-26T17:53:20.106Z

Reserved: 2026-07-13T16:39:22.250Z

Link: CVE-2026-62204

cve-icon Vulnrichment

Updated: 2026-08-26T17:53:15.521Z

cve-icon NVD

Status : Deferred

Published: 2026-08-22T13:16:39.547

Modified: 2026-08-26T18:16:43.387

Link: CVE-2026-62204

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-23T16:46:59Z

Weaknesses