EUVD-2026-23838
GHSA-gqp3-hfc3-8q54
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
8DescriptionCVE.org
A weakness has been identified in usememos memos up to 0.22.1. This affects the function memos_access_token of the file src/App.tsx of the component UpdateInstanceSetting. This manipulation of the argument additionalStyle/additionalScript causes improper authorization. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Improper authorization in usememos memos up to version 0.22.1 allows authenticated remote attackers to bypass access controls via manipulation of additionalStyle and additionalScript arguments in the UpdateInstanceSetting component, potentially leading to unauthorized information disclosure, modification, and service disruption. The vulnerability has publicly available exploit code and affects the memos_access_token function in src/App.tsx. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | This vulnerability requires an authenticated user account on the target usememos memos instance (PR:L in CVSS indicates low-privilege authentication required - not administrative or special role). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This vulnerability presents moderate real-world risk with several concerning signals. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated user with limited memos account privileges (such as a read-only user or collaborator with restricted permissions) crafts an HTTP request to the UpdateInstanceSetting endpoint, manipulating the additionalStyle or additionalScript parameters to inject unauthorized payload. The memos_access_token function fails to validate whether the authenticated user has permission to modify these settings, allowing the request to succeed. … |
| Remediation | Upgrade usememos memos to a version newer than 0.22.1 immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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