Security readout for executives and security teams
Plain-English summary
Synology DSM systems older than 6.2.1-23824 contain an authenticated XSS issue in Control Panel SSO Settings. A privileged user could place script or HTML through a URL parameter, potentially affecting another user's browser session if they interact with it.
Executive priority
Treat this as a moderate-priority hygiene fix for Synology administration surfaces. It is not evidenced as actively exploited, but XSS in an administrative SSO area can create avoidable account and configuration risk.
Technical view
CVE-2018-13293 is CWE-79 in Synology DiskStation Manager before 6.2.1-23824. The CVSS 3.0 vector is AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L, indicating network reachability, high privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Synology DSM instances running versions before 6.2.1-23824, especially where authenticated administrators or SSO configuration users can access Control Panel SSO Settings.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The vulnerability requires authenticated high-privilege access and user interaction, reducing broad internet-scale urgency but still mattering for shared administration environments.
Researcher notes
Evidence is concise: affected component is Control Panel SSO Settings, input is the URL parameter, and impact is arbitrary web script or HTML injection. The bundle does not provide proof-of-concept details, exploit telemetry, or additional affected version granularity.
Mitigation direction
- Upgrade Synology DSM to 6.2.1-23824 or later.
- Review Synology advisory Synology_SA_18_51 for vendor-specific guidance.
- Restrict DSM administrative access to trusted users and management networks.
- Audit privileged DSM accounts and remove unnecessary SSO configuration access.
Validation and detection
- Inventory Synology DSM assets and record exact DSM versions.
- Flag any DSM version earlier than 6.2.1-23824.
- Confirm whether Control Panel SSO Settings are used or exposed to privileged users.
- After upgrade, verify DSM reports 6.2.1-23824 or later.
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-2018-13293 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
- 5.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:H/UI:R/S:C/C:L/I:L/A:L1.73.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.9MediumVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.synology.com/security/advisory/Synology_SA_18_51CVE 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.