Security readout for executives and security teams
Plain-English summary
This vulnerability affects Pluck CMS 4.7.10-dev2. A flaw in file upload handling through theme.php can allow a remote attacker to execute code and access sensitive information. The CVSS vector indicates high privileges are required, so risk is highest where administrator-level CMS access is exposed or compromised.
Executive priority
Prioritize remediation for any internet-facing or business-critical Pluck CMS deployment using 4.7.10-dev2. The vulnerability can lead to full compromise after privileged CMS access is obtained, but current sources do not confirm active exploitation.
Technical view
CVE-2020-20919 is a CWE-434 unrestricted file upload issue in Pluck CMS 4.7.10-dev2 involving theme.php. The record assigns CVSS 3.1 score 7.2 with network access, low complexity, high privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to deployments running Pluck CMS 4.7.10-dev2, especially systems where high-privilege CMS accounts can access theme upload functionality. The CVE data lacks structured vendor, product, version, and CPE entries, so asset matching may require manual validation.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Public details are sparse and point to a GitHub issue. Treat this as a serious authenticated upload risk, not as confirmed widespread exploitation.
Researcher notes
The CVE record names Pluck CMS 4.7.10-dev2 and theme.php, but affected vendor/product fields are listed as n/a and no patch information is included. CVSS PR:H is important for scoping: validation should focus on authenticated high-privilege upload paths.
Mitigation direction
- Identify any Pluck CMS 4.7.10-dev2 instances in production or staging.
- Check the Pluck CMS project guidance for fixed versions or recommended mitigations.
- Restrict high-privilege CMS access to trusted administrators only.
- Disable or tightly control theme upload functionality where operationally possible.
- Monitor web and theme directories for unexpected executable files.
- Review backups and recovery plans for affected CMS hosts.
Validation and detection
- Confirm the installed Pluck CMS version on each suspected host.
- Verify whether theme.php is present and reachable by privileged CMS users.
- Review CMS accounts with administrator or equivalent upload permissions.
- Inspect web server logs for unusual theme upload or admin activity.
- Check theme and upload directories for unexpected server-executable files.
- Document manual findings because CPE data is absent in the CVE record.
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-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-20919 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
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/pluck-cms/pluck/issues/85CVE reference
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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.