Security readout for executives and security teams
Plain-English summary
Synology Note Station before 2.5.1-0844 allowed a logged-in remote user to inject script or HTML through a note commit message. If another user interacted with affected content, script could run in their browser, creating risk of data exposure, unauthorized in-app actions, or disruption.
Executive priority
Treat as a moderate priority. It is not described as actively exploited, but affected shared Note Station environments should be upgraded promptly because authenticated users could target other users’ browser sessions.
Technical view
CVE-2018-8912 is a CWE-79 XSS issue in SYNO.NoteStation.Note via the commit_msg parameter. CVSS v3.0 is 6.5: network exploitable, low complexity, low privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Synology Note Station deployments before 2.5.1-0844, especially multi-user or externally reachable environments. The provided sources do not include affected CPEs or detailed vulnerable version ranges beyond “before 2.5.1-0844.”
Exploitation context
The CVE requires a remote authenticated user and victim interaction. The source bundle does not show KEV listing or cited evidence of active exploitation, public exploit availability, or mass exploitation.
Researcher notes
Evidence is limited to CVE metadata and the Synology advisory reference. Validation should focus on version confirmation, authenticated-user exposure, user-interaction paths, and whether untrusted users can create or modify note commit messages.
Mitigation direction
- Upgrade Synology Note Station to 2.5.1-0844 or later per Synology guidance.
- Review Synology’s advisory for any additional version-specific instructions.
- Limit Note Station access to trusted authenticated users.
- Restrict external access where business need is absent.
- Monitor for unexpected script or HTML in note commit messages.
Validation and detection
- Inventory Synology Note Station deployments and record installed versions.
- Confirm each deployment is version 2.5.1-0844 or later.
- Review user and access controls for Note Station.
- Check logs or content history for suspicious commit messages.
- Verify externally exposed services are intentionally published.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-8912 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.5MediumVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.synology.com/zh-tw/support/security/Synology_SA_18_03CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.