Security readout for executives and security teams
Plain-English summary
CVE-2021-47776 is an SSRF issue in Umbraco CMS 8.14.1. An unauthenticated attacker may cause the server to make unintended outbound requests by manipulating baseUrl parameters in specific dashboard/help endpoints. Business risk depends on what internal services the Umbraco server can reach.
Executive priority
Prioritize review if Umbraco 8.14.1 is internet-facing or hosted in a network with sensitive internal services. The issue is not rated critical, but SSRF can become high-impact when internal systems are reachable.
Technical view
The CVE describes CWE-918 server-side request forgery affecting Umbraco 8.14.1. The reported endpoints are GetContextHelpForPage, GetRemoteDashboardContent, and GetRemoteDashboardCss. CVSS 4.0 is 6.9 with network attack vector, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is most relevant for internet-facing Umbraco 8.14.1 instances, especially where the application server can reach internal metadata, administrative, or private network services.
Exploitation context
A public Exploit-DB reference exists, but the provided sources do not show CISA KEV listing or confirmed active exploitation. Treat this as publicly documented and potentially reproducible, not proven exploited in the wild.
Researcher notes
Evidence is limited to the CVE details and public references. The bundle names affected version 8.14.1 and affected endpoints, but does not identify a fixed version. Avoid assuming impact beyond server-side outbound request capability.
Mitigation direction
- Identify any Umbraco CMS 8.14.1 deployments.
- Review Umbraco release notes and vendor guidance for the appropriate fixed version or upgrade path.
- Restrict outbound network access from Umbraco servers to only required destinations.
- Monitor web logs for unusual requests to the named dashboard/help endpoints.
- Reduce public exposure of administrative or dashboard functionality where operationally possible.
Validation and detection
- Confirm the deployed Umbraco version from asset inventory or application administration records.
- Check whether affected endpoints are reachable from untrusted networks.
- Review application and proxy logs for abnormal baseUrl parameter values.
- Validate server egress controls prevent access to sensitive internal services.
- Document whether vendor-recommended updates or compensating controls are applied.
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-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-47776 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
- 6.9 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA: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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.9MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50462CVE reference · exploit
- Umbraco Official HomepageCVE reference · product
- Umbraco CMS Release NotesCVE reference · product
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.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.