Security readout for executives and security teams
Plain-English summary
Evolution CMS 3.1.6 has a high-impact flaw where a logged-in user with module creation rights can turn that feature into server code execution. The main business risk is full compromise of the CMS host if an attacker obtains or already has a privileged account.
Executive priority
Treat as high priority for any affected CMS handling business content, customer data, or authentication flows. Prioritize exposure reduction and vendor-guided remediation, especially where manager access is internet reachable.
Technical view
The issue is CWE-94 code injection in Evolution CMS 3.1.6 module creation handling. The CVSS 3.1 score is 8.8 with network access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Evolution CMS 3.1.6 instances where attackers can authenticate with permissions to create modules. Internet-accessible manager interfaces and overprivileged CMS accounts increase practical risk.
Exploitation context
The bundle cites a public ExploitDB entry and VulnCheck advisory, so exploit information is public. KEV is false, and the provided sources do not establish active exploitation in the wild.
Researcher notes
Evidence supports authenticated RCE against Evolution CMS 3.1.6 with module creation permissions. Patch details are not named in the supplied bundle, so remediation should be verified against official Evolution CMS releases and guidance.
Mitigation direction
- Identify any Evolution CMS 3.1.6 deployments.
- Review vendor releases and guidance for upgrade or remediation status.
- Restrict manager access to trusted networks or VPN.
- Remove module creation rights from non-essential accounts.
- Audit privileged CMS accounts and reset suspicious credentials.
Validation and detection
- Confirm the installed Evolution CMS version.
- Enumerate accounts with module creation permissions.
- Review CMS modules for unexpected or unauthorized code.
- Check administrative logs for unusual module creation activity.
- Verify manager interfaces are not broadly exposed.
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-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-47939 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50296CVE reference, VulnCheck · exploit
- Official Product HomepageCVE reference, VulnCheck · product
- Product ReferenceCVE reference, VulnCheck · product
- VulnCheck Advisory: Evolution CMS 3.1.6 Authenticated Remote Code Execution via Module CreationCVE reference, VulnCheck · third-party-advisory
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 Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.