Security readout for executives and security teams
Plain-English summary
CVE-2026-28117 affects the WordPress smart SEO theme through version 2.9. It is a local file inclusion issue that could let an unauthenticated remote attacker cause the site to include unintended local files. The published severity is high, but public details are limited.
Executive priority
High priority for organizations running WordPress with this theme, especially on public websites. The vulnerability has high potential impact, but current public evidence does not show active exploitation. Focus on fast inventory, version verification, and vendor-guided remediation.
Technical view
The CVE describes CWE-98: improper control of a filename used in PHP include/require logic. Affected product is axiomthemes smart SEO / smartSEO through <= 2.9. CVSS 3.1 is 8.1 with network access, no privileges, no user interaction, high complexity, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress sites using the smart SEO theme at version 2.9 or earlier. Internet-facing WordPress deployments are the primary concern because the CVSS vector indicates network reachability and no required authentication.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked in KEV. Exploitation is rated high complexity, so it may depend on specific site configuration or reachable vulnerable code paths. No exploit details are included in the cited material.
Researcher notes
Public technical detail is sparse. The CVE and Patchstack entry identify a PHP local file inclusion condition in smartSEO through 2.9, mapped to CWE-98. No affected code path, patch version, proof of concept, or exploitation-in-the-wild evidence is provided in the source bundle.
Mitigation direction
- Inventory WordPress sites for the smart SEO theme and identify installed versions.
- Treat smart SEO versions 2.9 and earlier as affected.
- Check vendor or Patchstack guidance for an updated fixed release or official workaround.
- If no fix is available, disable or replace the affected theme on exposed sites.
- Prioritize internet-facing and business-critical WordPress sites first.
Validation and detection
- Confirm whether the smart SEO theme is installed on each WordPress instance.
- Record the installed theme version and compare it to <= 2.9.
- Review vendor and Patchstack pages for fix status before closing remediation.
- Monitor WordPress and web server logs for unusual file inclusion or path access patterns.
- Re-scan after update, removal, or replacement to verify exposure is gone.
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
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ATT&CK lookup starting points
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CWE-98: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-28117 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/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.
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:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
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 Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.