Security readout for executives and security teams
Plain-English summary
CVE-2026-22420 is a high-severity file inclusion flaw in the WordPress Horizon theme by AncoraThemes. A vulnerable site running Horizon version 1.1 or earlier could allow an unauthenticated attacker to include local PHP files, potentially impacting confidentiality, integrity, and availability. No active exploitation is cited in the provided sources.
Executive priority
Prioritize review of WordPress sites using the Horizon theme, especially public-facing sites. The potential impact is high, but exposure is narrow and active exploitation is not confirmed in the provided sources. Remediate or remove affected theme installations promptly.
Technical view
The CVE describes improper control of filenames used in PHP include/require statements, mapped to CWE-98. It affects AncoraThemes Horizon through version 1.1. CVSS 3.1 is 8.1: network-accessible, unauthenticated, no user interaction, high complexity, unchanged scope, with high C/I/A impact.
Likely exposure
Exposure is limited to WordPress sites with the AncoraThemes Horizon theme installed at version 1.1 or earlier. Internet-facing WordPress deployments are the primary concern. Sites not using this theme are not indicated as affected by the provided sources.
Exploitation context
The vulnerability is remotely reachable and does not require authentication or user interaction, but CVSS marks attack complexity as high. The provided bundle does not cite public exploitation, and the CVE is not listed as KEV. Treat as urgent for exposed sites, not confirmed exploited.
Researcher notes
Evidence is sparse. The CVE text references CWE-98 and PHP remote file inclusion terminology, while the title and description state local file inclusion. No patch version is named in the source bundle. Validate against vendor or Patchstack updates before final remediation planning.
Mitigation direction
- Inventory WordPress sites for the AncoraThemes Horizon theme.
- If Horizon is installed, confirm whether version is 1.1 or earlier.
- Check AncoraThemes and Patchstack guidance for an available fixed version.
- Update, replace, or disable the theme if no safe version is available.
- Remove unused copies of the theme from WordPress installations.
Validation and detection
- Review WordPress theme inventory for Horizon installations.
- Record installed Horizon versions across production and staging sites.
- Compare findings against the affected range: through version 1.1.
- Check Patchstack and CVE records for updated remediation details.
- Review web and application logs for unusual file inclusion-related errors.
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-98: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2026-22420 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
- 8.1 (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.