Security readout for executives and security teams
Plain-English summary
This vulnerability affects WordPress sites using Greenshift plugin versions up to 7.6.2. A logged-in administrator could upload files without proper file type checks. That can let a compromised or malicious admin place dangerous files on the server and may lead to remote code execution.
Executive priority
Treat as high priority for any site using the affected plugin, especially public WordPress properties. The vulnerability needs admin access, but successful abuse could affect the underlying server, not just page content.
Technical view
CVE-2023-6636 is a CWE-434 arbitrary file upload issue in Greenshift’s gspb_save_files function. Sources attribute it to missing file type validation through version 7.6.2. The CVSS 3.1 score is 7.2, with network access, low complexity, high privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is limited to WordPress installations running Greenshift – animation and page builder blocks up to and including 7.6.2, where an attacker has administrator-level capabilities or higher.
Exploitation context
The supplied sources do not show CISA KEV listing or confirmed active exploitation. The practical risk is highest after WordPress admin compromise, insider misuse, or abuse of overprivileged accounts.
Researcher notes
The evidence supports arbitrary file upload with administrator-level authentication. The bundle references vulnerable code and a WordPress Trac changeset, but does not provide exploit evidence or a named fixed release. Avoid claiming unauthenticated exposure.
Mitigation direction
- Update Greenshift beyond affected versions after confirming vendor guidance.
- Remove or disable the plugin if it is unnecessary.
- Restrict WordPress administrator access to trusted users only.
- Review admin accounts and revoke stale or excessive privileges.
- Monitor web-accessible upload locations for unexpected executable files.
Validation and detection
- Inventory WordPress sites for Greenshift plugin version 7.6.2 or earlier.
- Confirm whether vendor code includes file type validation for gspb_save_files.
- Review WordPress administrator accounts for compromise or unnecessary access.
- Inspect recent uploaded files for unexpected scripts or executable content.
- Check web server and WordPress logs for suspicious admin upload activity.
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-2023-6636 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://www.wordfence.com/threat-intel/vulnerabilities/id/821462d6-970e-4e3e-b91d-e7153296ba9f?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/trunk/settings.php?rev=3006373#L867CVE reference
- https://plugins.trac.wordpress.org/changeset/3009030/greenshift-animation-and-page-builder-blocks/trunk/settings.phpCVE 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.