Security readout for executives and security teams
Plain-English summary
HS Brand Logo Slider 2.1 for WordPress allows an authenticated user to upload arbitrary files by bypassing client-side extension checks. The reported impact is remote code execution if a server-executable file is uploaded. This is high risk for any site running the affected plugin, especially where untrusted or compromised WordPress accounts exist.
Executive priority
Treat this as urgent for any public WordPress estate using the affected plugin. The impact can be full site compromise, but current evidence does not show confirmed active exploitation. Prioritize inventory, removal or vendor-supported remediation, and compromise checks.
Technical view
The issue is CWE-434 unrestricted file upload in the admin interface logoupload parameter. Sources describe client-side extension validation that can be bypassed, allowing files renamed with executable extensions such as .php. CVSS 3.1 is 8.8 with low privileges required and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress sites running HS Brand Logo Slider version 2.1. The source bundle does not identify other affected versions, a fixed version, or specific required WordPress roles beyond authenticated users accessing the admin interface.
Exploitation context
A public ExploitDB reference exists, so proof-of-concept information is public. The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. Attackers would need authenticated access or a compromised account on an exposed WordPress site.
Researcher notes
Evidence supports an authenticated unrestricted upload leading to possible PHP execution. The bundle does not provide a patch, fixed version, affected role granularity, or active exploitation evidence. Avoid assuming broader version impact without vendor or CVE data.
Mitigation direction
- Inventory WordPress sites for HS Brand Logo Slider version 2.1.
- Disable or remove the plugin where it is not business-critical.
- Check vendor and WordPress plugin guidance for a fixed release.
- Restrict WordPress admin access to trusted users and networks.
- Review uploaded plugin media for unexpected executable files.
Validation and detection
- Confirm whether HS Brand Logo Slider 2.1 is installed on each WordPress site.
- Review WordPress user accounts for unnecessary or suspicious access.
- Inspect upload locations for executable files tied to logo uploads.
- Review web logs for suspicious admin upload activity involving logoupload.
- Verify any vendor-recommended update or removal has been applied.
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-2020-37227 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:H/I:H/A:H2.85.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/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-48913CVE reference, VulnCheck · exploit
- Official Product HomepageCVE reference, VulnCheck · product
- Product ReferenceCVE reference, VulnCheck · product
- VulnCheck Advisory: WordPress Plugin HS Brand Logo Slider 2.1 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.