Security readout for executives and security teams
Plain-English summary
This flaw can let someone with administrator-level access to a vulnerable Pluck CMS development build turn a page edit into arbitrary PHP execution. That can mean full site takeover. The sources do not show active exploitation, but the impact is severe if an admin account is compromised or abused.
Executive priority
Treat as high priority for any exposed Pluck CMS admin portal or development build. Confirm whether the vulnerable version exists, restrict administrative access immediately, and follow vendor guidance for remediation.
Technical view
CVE-2020-20918 is a CWE-94 code injection issue in Pluck CMS v4.7.10-dev2. The CVE describes arbitrary PHP execution through the hidden parameter to admin.php when editing a page. CVSS 3.1 is 7.2: network reachable, low complexity, high privileges required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure appears limited to Pluck CMS v4.7.10-dev2 installations using the affected admin page-edit path. Risk is highest when admin.php is reachable from the internet or when privileged CMS credentials are weak, shared, reused, or already compromised.
Exploitation context
The CVE is public and references a GitHub issue, but the supplied bundle does not show exploitation in the wild. It is not listed as CISA KEV. The attacker needs high privileges, which reduces likelihood but not impact after access is obtained.
Researcher notes
Affected product metadata in the bundle is incomplete, with vendor and product listed as n/a. Rely on the CVE description and GitHub reference for the Pluck CMS v4.7.10-dev2 scope. No patch details are provided in the supplied sources.
Mitigation direction
- Check Pluck CMS vendor guidance and issue 80 for fixed or safe versions.
- Remove or replace vulnerable development builds where possible.
- Restrict admin.php to trusted networks or authenticated VPN access.
- Enforce unique MFA-protected administrator accounts where supported.
- Review CMS file permissions to limit PHP write impact.
- Monitor page edits and unexpected PHP file changes.
Validation and detection
- Inventory all Pluck CMS deployments and record exact versions.
- Confirm whether any instance runs v4.7.10-dev2.
- Verify admin.php is not publicly reachable unless required.
- Review admin account activity around page edits.
- Inspect CMS content and webroot for unexpected PHP changes.
- Check whether compensating access controls are enforced.
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 lookupCVE-2020-20918 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/80CVE 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.
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.