Security readout for executives and security teams
Plain-English summary
Chevereto versions up to 3.13.4 are reported vulnerable to unauthenticated remote code execution during database setup. If an exposed site still allows access to the installer or database configuration flow, an attacker could run code on the server. This is business-critical for public image-hosting deployments because compromise can affect data, service availability, and server integrity.
Executive priority
Treat as urgent for any public Chevereto deployment on version 3.13.4 or older. Prioritize inventory, exposure reduction, and upgrade planning. Public exploit availability raises operational risk even without confirmed active exploitation evidence.
Technical view
CVE-2020-37186 is a CWE-94 code injection issue in Chevereto Core <=3.13.4. The reported flaw involves manipulating the database table prefix during installation to write PHP code, enabling arbitrary command execution through crafted requests. CVSS is 9.8, network exploitable, low complexity, no privileges, and no user interaction.
Likely exposure
Highest exposure is internet-facing Chevereto <=3.13.4 where installation or database configuration endpoints remain reachable. Systems already installed but with installer access disabled may have reduced exposure, but the provided sources do not fully define runtime conditions.
Exploitation context
A public Exploit-DB entry exists, so practical exploitation details are publicly available. The source bundle does not show CISA KEV listing or cited evidence of active exploitation in the wild.
Researcher notes
The core issue is reported as improper neutralization of code during database configuration, mapped to CWE-94. Evidence is strongest from CVE/VulnCheck metadata and Exploit-DB publication. Vendor-specific fixed-version confirmation is not provided in the bundle; verify directly against Chevereto release notes.
Mitigation direction
- Identify all Chevereto deployments and confirm version numbers.
- Remove public access to installer and database configuration workflows.
- Upgrade away from Chevereto <=3.13.4 following vendor release guidance.
- Restrict administrative and setup paths at the web server or network layer.
- Review servers for unexpected PHP files in web-accessible directories.
Validation and detection
- Check whether Chevereto version is 3.13.4 or older.
- Confirm installer and setup routes are not publicly reachable.
- Review web logs for suspicious installation or configuration requests.
- Inspect application directories for recently created unexpected PHP files.
- Compare installed code against vendor releases and expected deployment files.
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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-37186 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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.
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-47903CVE reference · exploit
- Chevereto Official HomepageCVE reference · product
- Chevereto Free GitHub ReleasesCVE reference · product
- VulnCheck Advisory: Chevereto 3.13.4 Core - Remote Code ExecutionCVE reference · 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.