Security readout for executives and security teams
Plain-English summary
This CVE describes a critical file upload flaw in the WordPress WP Super Edit plugin. An attacker could upload unsafe files without proper validation and potentially gain remote code execution. For affected WordPress sites, this can mean full site and server compromise.
Executive priority
Treat as urgent for any internet-facing WordPress site using WP Super Edit. The issue is remotely reachable, low complexity, unauthenticated, and can lead to complete compromise. Prioritize finding and removing exposure before routine maintenance windows.
Technical view
WP Super Edit 2.5.4 and reportedly earlier versions include an unrestricted file upload issue in the FCKeditor component. The source describes arbitrary dangerous file uploads through the filemanager upload endpoint, with CVSS 9.8 and CWE-434. The affected data specifically lists WP Super Edit 2.5.4.
Likely exposure
Exposure is limited to WordPress sites running WP Super Edit, especially version 2.5.4 and possibly earlier per the description. Confirm plugin presence and exact version across public WordPress estates.
Exploitation context
The bundle cites an ExploitDB reference, so public exploit information exists. The CVE is not listed as KEV in the provided data, and the bundle does not provide evidence of active exploitation.
Researcher notes
Evidence supports critical severity, CWE-434, affected WP Super Edit 2.5.4, and public exploit reference existence. Patch status is not stated in the bundle. The “earlier versions” claim appears in the description, while structured affected data lists 2.5.4.
Mitigation direction
- Check official vendor or WordPress plugin guidance for a fixed version or removal recommendation.
- Disable or remove WP Super Edit where business impact allows until remediation is confirmed.
- Restrict administrative and file upload surfaces with existing web controls where feasible.
- Review webroot permissions to reduce damage from unauthorized uploaded files.
- Prioritize backups and recovery readiness for affected WordPress hosts.
Validation and detection
- Inventory WordPress sites for WP Super Edit installations and exact plugin versions.
- Confirm whether installed versions match 2.5.4 or earlier per the source description.
- Review logs for upload activity involving the FCKeditor file manager component.
- Inspect webroot and plugin directories for unexpected executable or recently added files.
- Check whether the WordPress host has signs of post-upload code execution.
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-2021-47965 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.
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:N/UI:N/S:U/C:H/I:H/A:H3.95.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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
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-49839CVE reference, VulnCheck · exploit
- Official Product HomepageCVE reference, VulnCheck · product
- Product ReferenceCVE reference, VulnCheck · product
- VulnCheck Advisory: WordPress Plugin WP Super Edit 2.5.4 Unrestricted File UploadCVE 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.
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.